DIALux evo 12.1 (Patch 2)

This is a patch version.

Among other things, a memory error with DIALux objects (.dxobj file) has been solved in this patch version.

DIALux evo 12.1 (Patch 1)

This is a patch version.

In this patch version, a bug with the photometric units was solved. If these were set to "imperial", it meant that our evo software could no longer be started.

DIALux evo 12.1

Here you will find an overview of the new features and improvements in this version:


DIALux evo 12.0 (Patch 3)

This is a patch version in which the following points, among others, have been improved:

  • The selection of the reflection column in the RUG calculation.
  • Textures of furniture and objects after saving and loading.
  • Calculation after inserting outdoor areas.

DIALux evo 12.0 (Patch 2)

This is a patch version in which the following points, among others, have been improved:

  • A problem with the RUG calculation.

  • Problems in the documentation.

  • The number of grid points in the street could not be changed.

  • Security updates (Chromium and .NET).

  • SilentSetup did not work if .NET 6 was not already installed.

DIALux evo 12.0 (Patch 1)

This is a patch version in which, among other things, a problem with incorrectly oriented luminaires in the DWG export was solved and the performance of the luminaire selection was improved.

DIALux evo 12.0

Here you will find an overview of the innovations and improvements in this version:


DIALux evo 11.1 (Patch 2)

This is a patch release that fixes a few crashes when switching views and swapping lights, a shifted plan in outputs, and resetting the height of the extrusion body when polygonal editing, among other things.

DIALux evo 11.1 (Patch 1)

This is a patch version which, among other things, fixed a few crashes and a problem with shortcuts in the Polish language.

DIALux evo 11.1

Here you can find an overview of the new features and improvements in this version:


DIALux evo 11 (Patch 4)

This is a patch version that fixes a display error in the documentation (values with a red background in the false color legend).

DIALux evo 11 (Patch 3)

This is a patch version that fixes, among other things, some problems related to maintenance factors and the interface to the marketing information of our DIALux members.

DIALux evo 11 (Patch 2)

This is a patch version that fixes a loading problem.

DIALux evo 11 (Patch 1)

This is a patch version in which, among other things, some bugs have been fixed and improvements have been made:


  • Ukrainian added as another language

  • Added "remember password" function at login


  • Instead of email address, "Logged in" is now displayed in the login badge in the upper right corner

Fixed bugs:

  • Calculation occasionally got stuck on some systems

  • Connection/login problems in some regions (e.g. China)

  • Performance problem when working with large textures

  • Performance problem when working with large projects with many rooms

  • Performance problem when loading and saving in some projects with escape routes

  • Performance problem when moving the evo program window

  • Street: The light point overhang is now documented correctly, even if it was calculated

  • Street: A crash when duplicating the street with luminaire arrangement, if the luminaire was replaced previously

  • Rollover calculator of the automatic arrangement did not take over the modified value

  • The polygonal luminaire arrangement always used 500 lx instead of the value from the usage profile

  • Item 13 was missing in the standards database for EN12464-1:2021

DIALux evo 11

In the following you will find an overview of the new features and improvements in this version:


DIALux evo 10.1 (Patch 3)

This is a patch version in which, among other things, some bugs have been fixed and improvements have been made:

•     Processing problems of some models solved, which led among other things to the fact that projects could not be loaded any more.

•     When displaying the results of the working plane according to the EN 12464 grid, in some cases incorrect results were displayed on the grid. 

•    The news stream no longer opens automatically when calculating in documentation mode.

DIALux evo 10.1 (Patch 2)

This is a patch version in which, among other things, some bugs have been fixed and improvements have been made:

•     Performance at evo start significantly improved

•     Crash when moving a calculation surface fixed

•     Objects with 3DS models can be inserted again

•     News are no longer opened automatically when switching to the documentation

•     Storey height corrected when drawing buildings

DIALux evo 10.1 (Patch 1)

This is a patch version in which, among other things, some bugs have been fixed and improvements have been made:

•     Performance optimization when opening the luminaire list.

•     Timing problems with the DWG export.

•     The installation location no longer changes during the evo update.

•     Calculation abort during glare calculation in outdoor planning.

DIALux evo 10.1

In the following you will find an overview of the new features and improvements in this version:


DIALux evo 10.0

In the following you will find an overview of the new features and improvements in this version:


DIALux evo 9.2

In the following you will find an overview of the new features and improvements in this version:


DIALux evo 8.2 (Patch 1)

This is a patch version that fixes translation problems and a .DLL conflict with newer offline catalogues.

DIALux evo 8.2

New features:

DIALux evo 8.2 provides the option to configure proxy servers under >>settings / general Settings / connection settings<<.

Changes and improvements of known Features:

The DIALux start splash screen has a new layout and shows the progress of loading DIALux.


Fixed CAD display issues and crashes related to AMD Vega GPUs.
• A change to the energy tool no longer leads to a change in the utilisation profile of the area.
• Isolines can be saved again with a resolution higher than 1lx.
• Crashes during the calculation of some complex projects could be solved.
• Utilisation profiles for indoor and outdoor areas can now only be assigned to the appropriate areas.
• Correction of ULR calculation in road planning.
• Correction of the rotation for multi-headed luminaires in road lighting.
• Fixed crashes while loading projects and import of IFC files.
• Some translation errors have been corrected.

DIALux evo 8.1 (Patch 3)

This is a patch version in which several bugs have been fixed.

Among other things, a problem with multichannel lights and problems with daylight quotient chartings has been fixed.  

DIALux evo 8.1 (Patch 2)

This is a patch version in which several bugs have been fixed.

Mainly an acute problem with the representation of some SAT model luminaires was solved. 

DIALux evo 8.1 (Patch 1)

This is a patch version in which several bugs have been fixed.

In particular, a bug has been fixed where users were given an exception in various languages when switching to the results of road planning. Furthermore, a problem was solved where the automatic chartings were not generated if isolines and value graphics were activated.

DIALux evo 8.1

New features: 

  • Integrated message window with useful hints and information for support in working with evo.

  • Two additonal standard objects: hemisphere and cone (truncated cone).•Allocation of luminaires that are located in more than one space can be changed to a particular one for documentation purposes. 

  • Japanese maintenance factor method according JIEG-001.

  • Import wizard for DWG/DXF files (similar to image import wizard).

Changes and improvements of known features:

  • Multiselection of single objects with line, field and circle arrangements.

  • Image plans that are imported once can be rescaled via import wizard again.•Change the sorting of road scene results.

  • Images can now be deleted in documentation directly.

  • Description of objects in project tree is more expressive.

  • Speed improvements in working with luminaires and calculation surfaces.

  • Speed improvements in loading sophisticated projects.•Speed improvemtens in exporting DWG files (depends on project size).

  • Speed improvements in rendering documentation.•Speed improvements in rendering false colours and isolines.

  • When creating an object in the scene the allocation (storey, indoor or outdoor) depends no longer on the view that is currently active. The allocation depends now on object's position itself.


  • Documentation of surface results objects is sometimes to small.

  • Documentation template "All" is extended by luminaire parts list for exterior area too.•Issue during visualization of results after combining light scenes.

  • Issue during calculation of maintenance factors for luminaires which were not assigned to spaces.•Issue during loading Evo files greater than 7GB.

  • Improved import behaviour for IFC, JPEG and Dialux 4 files.

  • Improved import behaviour for SAT models.

  • Improved undo behaviour for evo road.

  • Issue calculating G* classes in evo road according EN 13201:2015.

  • Issue during Drag & Drop of skylights.

  • Issue during Drag & Drop of luminaires.

  • Issue during dimensioning of windows.

  • Issue during scaling of ASR calculation surfaces.

  • Issue during visualization for element rotation.

  • Duplicating a road geometry copies arrangements name too.

  • Improved translation

DIALux evo 8.0 (Patch 3)

This is a patch version that fixes a problem with the HTML plugins.

DIALux evo 8.0 (Patch 2)

It is a patch version in which some serious bugs were fixed.

In particular, the image import has been accelerated and some problems with the documentation have been fixed. Furthermore, doors (outside) should no longer be shown in black when calculating daylight.

In addition to drawing (individual) space, you can now draw interior contours again without having to restart the action after each room.

DIALux evo 8.0 (Patch 1)

It is a patch version in which some serious bugs were fixed.

DIALux evo 8

Bug fixes

  • An error has been fixed in the alignment of objects when copying along a line or a curve.

  • Typing values in the polygonal line table using “Enter” now works as expected. The focus is now set to the next field.

  • An error when moving rotated columns has been fixed.

  • An error in scaling of beams has been fixed.

  • An error has been fixed for daylight-relevant windows inside of a building.

  • The room description is now also included in the outputs of the simple indoor planning.

New Features

  • Using of images as planning basis. Supported are * .jpg, * .bmp and * .png files.

  • Support also of several raster graphics as planning basis in one project.

  • Import Wizard to specify origin and matching size.

  • Import of images via drag & drop.

  • Import of images from the Windows clipboard, e.g. via the Windows snipping tool.

  • The project start "empty rectangular room" has been replaced by the new function "Room planning", which allows the creation of any room shape

  • Rooms can now be drawn directly into the CAD. The outer contours are generated automatically.

  • When outer contours of different rooms touch, a new outer contour is automatically generated.

  • When entering polygonal lines, the lengths of the individual line is now displayed as well as the angle between the lines.

  • Lengths and angles of polygonal lines can be entered directly via the TAB-key.

  • Entered values are blocked for mouse input, which is indicated by a small lock-symbol.

  • When scaling objects the new lengths can be entered directly via the TAB-key

  • All objects can be set to the center of a room or an area via the context menu

  • Each room, floor, building and terrain view has its own coordinate system.

  • These coordinate systems can be positioned and oriented by the user.

  • All positions and rotations of objects are related to these coordinate systems.

  • In the luminaire tool the luminaire efficiency and the luminous efficacy are additionally specified for the lighting data.

  • In the luminaire tool a summary of the photometric data is displayed for luminaires with more than one light emitting surface.

  • The north orientation is displayed in 3D and 2D with a small preview at the bottom right for each room, floor, building and terrain view.

  • The appearance of the north orientation can be shown or hidden in the view options.


  • The standard database was updated to EN 12464-1: 2011 and EN 12464-2: 2014

  • The point grid for calculation areas has been revised.  Each raster  is calculated strictly according to EN 12464-1 and -2

  • The manual is no longer available for DIALux evo. Alternatively there are more up-to-date online resources for this.

  • The nodes in the output tree with the room names are sorted alphabetically.

  • The drawing of a coordinate system is available on the top of the CAD window.

  • The behaviour of polygonal lines and building contours has been revised.

  • The behaviour of the table for polygonal lines has been revised. 

  • The minimum size of calculation areas has been adjusted.

  • Measurement files from daylight-guided-light systems (DDLS) can now be send to DIALux evo by drag & drop.

  • luminaires in the road-lighting can now also be deleted via the context menu.

  • In the planning results of the road-lighting, in addition to the main Arrangement, the secondary arrangements are displayed

DIALux evo 7.1 (Patch 2)

It is a patch version in which some serious bugs were fixed.

DIALux evo 7.1 (Patch 1)

It is a patch version in which some serious bugs were fixed.

DIALux evo 7.1

Here you find a little tutorial about the new functions in our DIALux evo version 7.1: https://www.youtube.com/watch?v=NzBxOzUOaZA


• The x64 and x86 versions are now installed parallel (on 32bit systems only x86)


• The representation of the GR values in the result monitor was revised.

• Several minor errors in editing objects in the CAD have been fixed.

• An error while editing the floor contours in combination with the UNDO function has been fixed.

• Fixed some problems with corrupt luminaire data.

• Fixed a problem with displaying rooms after importing IFC files.


New functions:

• The lengths of manipulators are displayed in the CAD during construction.

• The manipulators of auxiliary grid and the texture scaling now display the distances of the individual elements in the CAD.

• The lengths and distances of manipulators can be edited directly in the CAD via "TAB"-key.

• evo now distinguishes between two calculation types "Standard" and "Fast".

• In "Fast" mode, only the visible part of the building calculated.

• The entire calculation pipeline has been revised and accelerated. The calculation times are thereby reduced.

• In addition, the calculation can be limited to calculation surfaces using the setting „Calculate surfaces only".

• Min, max, average value and uniformity of luminance are now available in the output.

Improvements of existing features:

• Output: In the room summary the floor based room height was replaced by the clear room height.

• The graphical interface has been revised and improved. The tools are more compact and require less space.

• The manufacturer selection can no longer be closed.

• Canceling the calculation is now faster.

• Loading and saving complex projects has been speeded up.

DIALux evo 7.0 (Patch 2)

It is a patch version in which various bug fixes are solved, especially the calculation of windows. Besides this there are also some performance improvements implemented.

DIALux evo 7.0 (Patch 1)

It is a patch version in which several problems are solved, especially the calculation of roof windows and the updating of views.

DIALux evo 7.0


• The visualization of floor recessed light outputs has been improved. 

• Workplanes and daylight factor calculation surfaces are now included in the room summary printout.

• An error during manipulation of polygonal roofs has been solved. 

• A warning has been solved, that occured when removing objects from a project. 

• An error in copying buildings and storeys has been solved.

• The documented specific connection load (W/m²) is now calculated based on the room's floor area.

New functions:

• IFC import: Entire buildings and outdoor areas can now be imported automatically from IFC project files, without the need of manual contruction.

• DWG drawings can now be included in printouts as a cutout of the required part.

• The room summary's layout has been improved. In addition, there is the option of a simple and a detailed luminaire part list. By default, the simplified luminaire part list will be shown in the room summary.

• A luminaire position plan is now included in the printouts in addition to a configurable reference coordinate system for outdoor scenes. 

• Calculation time can now be reduced by use of new calculation parameters as there are: "Only direct lighting without reflections", "Calculation without furniture" and "Simplified indirect illumination of furniture and objects". Active parameters will be documented in the printouts and the results overview.

• Parts of calculation planes can be excluded from calculation and result interpretation by a cutout function. This is available for calculation grids, workplanes, task areas, room main surfaces, ASR A3.4 workstation areas and EN 12464-1 visual task areas.

• Article numbers have been added to the luminaire catalog of road lighting.

• Secifications according to IESNA Lighting Handbook (10th edition) have been added to the standards database. 

• The set aim angles of adjustable luminaires can now be exported as *.csv file. 

Improvements of existing features:

• Loading DIALux projects is no longer interrupted by message boxes.

• The printout page conficuration has been removed from the bottom area of the screen and is now available as overlay, making the configuration more convenient. The current page will be automatically re-rendered as soon as the configuration page is closed.

• All product data sheets are now be grouped below one node in the printout tree. This significantly reduces the size of the tree and gives a far better orientation.

• Unavailable pages are now hidden in the tree instead of showing them as disabled. This also reduces the printout tree size without losing information or functionality.

• The pages for results overview, isolines, false colors, value chart and value grid are now combined in one page. There is one page per calculation plane and parameter. The desired result visualizations can be selected in the page configuration. All visualizations are activated by default.

• The option to show DWG drawing has been removed from the display options and placed next to the view navigation bar. Additional drawings can be loaded from this place. The DWG control has been removed from the site, building and storey construction tools.

• Result value grids and isolines are now been displayed automatically after calculation a light scene. This function can be activated and deactivated in the application settings, in the section "CAD", if needed.

• The default value range of isolines is now automatically set based on the calculated lux levels.

• The calculation time of isolines, false colors and value grids for the CAD window is significantly reduced due to parallelization.

• The user interface for configuration of isolines has been redesigned. User defined value scales can now be saved and reused.

DIALux evo 6.2 (Patch 2)

It is a patch version in which various bug fixes are solved, especially in the street planning.

DIALux evo 6.2 (Patch 1)

Fixed problems:

• Fixed a problem while loading Projects

• Fixed an issue with model-luminaires in road lighting

• Recent C ++ 2015 runtimes are now installed

• Improved project loading performance

• IES files can now be sent to evo via Shell Extension

• Fixed a problem with the 3D DWG Export

• Fixed some minor issues with the snap

DIALux evo 6.2

Improvement of daylight calculation

• The transmission diagram has been visually improved. The theta angle is now documented in the printouts.

• The part “daylight information” has been added to the room summary printouts.

• Calculation surfaces for daylight factors are showing the average value of the daylight factors.

• The layout of daylight factor calculation surface outputs has been reworked.

• Openings as windows and doors can now be placed via drag &amp;amp; drop also in 2D.

• DDLS files for façade systems can now be placed via drag &amp;amp; drop.

• Roof lights are now aligned according to the shape of roof when being copied.

• The progress of calculation daylight and façade systems is shown in a more detailed way.

• The calculation of the refraction index works correctly now, also for glass type “no glass”.

Performance boost for loading projects

• Projects that are stored with DIALux evo 6.2 or above can be loaded up to 50-80% faster than before. The exact result depends on the type of the saved project.

Improvements in road lighting

• New IES file import assistant: Geometric dimensions for luminaire case and light output can be entered. The user is guided by a visual assistant.

• Road profiles for documentation can be selected during the planning.

• Results which fulfil and those which do not fulfil any normative condition are now highlighted in the result table.

• According to EN 13201:2015, DIALux provides an optional TI calculation of C and P classes, if desired.

• The optimization now uses 5 parameters as there are pole distance, light centre height, boom angle, light overhang and now also the minimal energy consumption needed. For this optimization, DIALux uses all equipment information given for a luminaire.

• The layout of road planning printouts has been improved to fit to one page for most cases.

Documentation of luminaire positions

• The printouts show luminaire coordinated within the ground plan as well as in a position table.

• The luminaire orientation of C0/G0 planes are documented in CAD and ground plan.

• Luminaires are systematically numbered to be easier found in table and ground plan.

• Users can freely define a coordinate system for each room which is used as reference point for documenting luminaire positions.

Improvement of lamp tool

• The display of the correlated colour temperature (CCT) has been improved. In many cases the given spectrum did not fit to the CCT. The CCT is now always been taken from luminaire data.

• The declaration of the colour rendering index (RCI) has been improved.

• Different technical terms as well as their translation have been improved.

• The way of how to select luminaires and luminaire arrangements in the lamp tool has been changed.

• Implausible CCT and CRI values that are not physically covered by a black body radiator are caught and explicitly handled for the documentation.

• DIALux evo now enables the user to create black body spectra for a given CCT in case no measured spectrum is given.

• The layout and usability of the lamp tool have been improved.


• In addition to those developments, several minor bugs have been solved.

DIALux evo 6.1

Resolved issues

• an issue in the Asian documentation fixed

• graphics problems with Intel chipset of HD5xxx series fixed

• some causes for crashes fixed

• an error in the presentation calculated lights fixed

• some minor errors in the road calculation have been fixed

• problems in the visualization of value charts fixed

• translation for Dutch language improved

DIALux evo 6.0

New features

• calculation of daylight control systems

With the new DIALux evo 6, the planner can include real daylight control systems, skylights and façade elements in his daylight calculation.

This includes vertical louvre blinds and textile blinds, skylights, foils and prismatic systems. The lighting designer places and configures multiple daylight system in layers.

Depending on the date, time, orientation of the building and sky model DIAlxu calculates the daylight factor and illuminance values inside the building.

All results are available in the reslut overview and in the project documentation. There is also documentation about the daylight situation and detailed product descriptions.

The light-guiding systems are using the new hemispherical transmittance chart. With just one click the user can transfer systems to other windows.

For product selection you can use electronic catalogs of manufacturers of sunscreen and daylight control systems.

Alternatively, you import product data via the new ODLS (Open Daylight System) - format or the DIALux DDLS format.

It includes images and product descriptions as well as all photometric data.

- implementation of the new standard for street lighting EN 13201: 2015, Part 2.3 and 5

- new user interface for road lighting

- location names can be edited permanently now

- performance improvements in lighting catalogs and road planning

Bug fixing according to:

• selection

• undo / redo

• visibility of objects

• loading and saving

• dealing with windows

• producing materials

DIALux evo 5.2 Patch

Fixed problems

• A crash when exchanging multiple windows has been fixed.

• Some luminaires could lead to problems with the calculation. The calculation is now performed with these luminaires.

• The allocation of areas to certain rooms was partially defective which led to problems in the result monitor. The problem has been eliminated.

• The layout of rooms were partially shown too small. This was caused by the incorrect consideration of DWG drawings in the size determination. The output is now shown always correct.

DIALux evo 5.2

New features:

• Tool for maintenance factors, for simplified or detailed calculation according to CIE97:2005

• Tool and catalogue for calculation surfaces according to standards

• Tool for reference lines, dimensioning and text

• New calculation surface type for lighting design according to standard ASR A4.3

• Shorter calculation times due to reduced amount of luminaire groups. Initial and separated luminaire groups for all outdoor and indoor luminaires

• Separated tool for working planes

• Change of extrusion volumes after creation

• DWG file export for daylight factor results

• Export of HDR images width extended dynamic range (32bit per colour channel and luminance value)

• Cancellation of running DWG file exports

• Rotation of value charts by 90° steps

• Extended configuration for isolux lines, start value, step size, count of steps

• Creation of empty light scenes without luminaire groups by default

• CAD based size editing for apertures with scale function

• Improved visualization of results overview

• Colour code for movement and rotation with input fields

• Zoom at mouse position for 2D and 3D CAD views

• Summary of results for room main surfaces in results overview

• Visual improvement of message dialogues

• Visual improvement of false colour key

• Implementation of OEM functionality

• Extended room summary page with information for wall zones, height and surrounding areas of calculation surfaces

• Extended luminaire data sheets and parts lists for information of colour temperatures and colour rendering index

• Improved visualization of false colour keys in outputs

Fixed issues:

• Luminaire groups with different dimming values are no longer combined together

• Names of luminaire groups will now be copied during copying light scenes

• After loading a project the saved view is visualized properly

• Fixed issues for loading project files

• Fixed issues for geometry processing

DIALux evo 5.1

• Fixed a problem when updating the calculation results

• Fixed two problems loading old projects

• An error occurred while copying a road scheme

• An error occurred while duplicating floors

• Fixed a crash when changing a room profile

• Fixed an issue in conjunction with the Deleting of lights

• Fixed a crash when updating views

• Fixed a crash when renaming raytracing images

• An issue with invalid material properties

• Two errors in the Undo-Redo function

• Fixed a bug that resulted in a fatal loading Error when loading projects

• Fixed a crash related to the placing of materials

• An error during the start of DIALux evo

• An error in the display of UGR and GR results

• Fixed a crash during calculation

• An error occurred while adding additional lanes in the street planning

• An error in the building Opening Tool

• Fixed a crash when determining the page numbers in the documentation

• The DWG Export now displays correct imperial units

• Fixed a problem when saving projects

• Fixed a crash when doing multiple selection of room main surfaces

• Fixed a bug when creating empty, rectangular rooms

• A problem with the use of several adaptive calculation areas

• Fixed an issue with invalid Time Zones

• Incorrect calculation of the floor area of rooms

• Fixed a bug when importing DIALux 4 projects

• A problem associated with defective luminaire data

• A problem with the accessibility of the website of DIAL from DIALux evo

• Some improvements in the translation of DIALux evo

• An improvement in the HDR export function

• An error message in the street planning

• Fixed an issue with the correct display of grid points

DIALux evo 5

• Display and configuration of value grids in the CAD

• Color Selection for value grids

• Highlighting of minima and maxima

• Combination of false colors, isolines and value grids on surfaces.

• Display of these combinations in the renderings for the outputs.

• Coupling beetwen false colors and isolines canceled.

• Isolines can now be set and colred separately for each area.

• The view tool was added to the export mode.

• Displaying article number to product names of luminaires, in the active luminaire, the data sheet window, in the tooltips of tiles, as well as in the list view.

• Graphical review of the results tool.

Connection of the progress bar with the result tool

With the elimination of the calculation mode detail information that inform about the calculation progress are missed when calculating.

This information will be available in the result tool from this version.

Extension of DWG export function

• Per light scene can be generated a separate DWG plan (file!) by the planner.

• Incorrect representation of too many triangles in 2D DWG files has been fixed (with the exception of complex lighting and furniture models, 3DS, SAT, etc. )

• Lights and furniture are exported as blocks to Auto CAD.

• Evo dimension objects are exported to AutoCAD dimension objects.

• Expansion of the luminaire parts list to specifications for equipping, luminous flux, maintenance factor (fixed), power input, and an index for locating in the plan.

• Export opportunities for luminaire (max per floor)

- All luminaires in an integral layer

- All luminaire prototypes in its own layer

- All luminaire arrangements in its own layer with the possibility to summarize that individual arrangements for a layer.

• Table per floor for results of calculating areas with the information o the minimum, maximum, mean values, uniformity, and an index for locating in the plan.

• Expanded space designation to lighting power desnity

• Freely definable identifier for umiaire prototypes that can be written in DWG export as an index to the luminaire.

• Export oportunitites for value charts (max per floor)

- Per calculation parameters a layer with the corresponding value grids.

- Per calculation parmeters and scanning its own layer

Room main surfaces automatically placed on the walls

In contrast to the previous versions, the calculation areas of the main room surfaces are now initially placed directly on the walls.

Of course, they still can be placed manually.

Vertical illuminance as default for virtual calculation objects

The initial calculation parameters for vertical calculation space has been changed from the horizontal illuminance to the vertical illuminance.

This has mainly effect on inclined and rotated calculation surfaces.

Link to the Chinese video platform

So far DIALux evo refers to tutorials that are stored on the video platform Youtube, to explain basic functions and principles.

With the coming DIALux evo version the Chinese video platform Youku will also be available.

Improvements in road lighting

• Separation of the NPR 13201 and ROVL 2011

• If the ROVL 2011 is selected, the lighting situations are hidden.

Optimization of the selection behavior of calculation objects 

The selection of calculation surfaces in the CAD hasbeen revised and simplified.


• Fixed a bug of the translucent contours of lower floors in the plan view

• Fixing of some errors related to incorrect lighting data

• Fixed a bug related to missing material data

• Resolving a display error in the UGR diagram

• Fixed some bugs related to the geometry creation.

• Fixed some errors related to the creation of windows.

• Fixed some errors in generating and changing of calculation surfaces.

• Fixed a bug when changing maintenance factors.

• Fixed a bug when moving windows.

• Fixed a bug when changing room main surfaces

• Resolve some problems with the undo/redo function

• Optimizing the display of long texts in the user interface.

• Resolve some problems in generating the output tree when loading older projects.

• Fixed a bug when changing dimension objects.

• Fixed some bugs in the user interface when changing the tool and mode.

• Improve the image quality of the raytracer, reducing the moire effect.

• Optimization of the output tree in relating to speed and selection of displayed pages.

• Optimization of discarding of calculation results in geometry changes.

• Fixed a bug when using your own logos in the outputs.

• When generating the output pages no more blank pages now be generated.

• Fixed a bug with the help reference grid. The help reference grid no longer returns to the default value 1m.

• Fixed a bug when working with templates in the editions.

• Optimization of the manipulators in the side view and the multiple use of materials.

• Fixed a bug after deleting floor contours.

• Fixed a bug when using descriptive text in the outputs.

• Fixed some errors when working with floor elements.

• Optimization of the manipulator for cutouts.

• Optimization of graphic card tests during setup.

• Fixed a bug when creating cutout objects.

• Optimized the manipulators for large DWG files.

• Optimized the view objects for the outputs.

• Optimized the zoom function.

• Fixed a bug that resulted in very dark scenes.

• Deleting projects templates is possible again.

• Fixed a bug related to materials on windows.

• Fixed a bug which prevented to mark the templates as favorites.

• Immediate display of new templates in the selection.

• Fixed a bug that prevented copying of storeys.

• Fixed a bug which hides out contours after loading.

• Optimized the functions for generating and moving roof panels.

• Fixed a bug when displaying page settings in the outputs.

• Optimized the DWG export.

• Fixed a bug which resulted in a false position of calculation objects.

• Optimization of memory usage when loading projects with huge 3DS objects.

• Display the correct preview when loading LDT and IES files.

• Fixed a bug when deleting cutout objects.

• Resolving a display error of projects with daylight calculation.

• Fixed a bug when insert combined objects.

• Resolving a representation error after importing DIALux 4 projects (32bit)

• When drawing areas of activity the function can now be completed by using the context menu.

• Resolving a rounding error in the road calculation.

• Fixed a bug when changing tools in the context of road planning.

• Fixed a bug when combining sphere objects.

• Fixed a bug in the object preview.

• Fixed a bug in the function “Replace material”

• Fixed a bug when loading projects per drag &amp;amp;drop directly from the Windows Explorer

• Fixed a bug when saving converted projects.

• Optimization of the selection of buildings.

• Fixed a bug when starting DIALux evo.

• Optimization of the selection behavior in the street tool.

• Optimization of the mouse in certain dialogues.

• Fixed a bug when loading broken materials.

• Fixed a bug related to the selected outputs.

• Fixed a bug in the alignment of luminaires.

• Fixed a bug when changingtime zones for daylight calculation.

• Optimized the display of luminaire models for the calculation.

• Fixed a bug when displaying textures in the raytracing image.

• Fixed a bug that could lead to lack of calculation results on the working plane.

DIALux evo 4.1

• An error in the result tool was fixed that can be caused by an outdated .NetFramework. Adjustment of the setup to the .NetVersion 4.5.2

• An error when creating a raytrace image for repeated call of the raytracer was fixed.

• A problem when creating the geometry while loading a project was fixed.

• A Problem when loading projects with incorrect geometry was fixed.

• Avoid double bottom plates in generating empty floors.

• An error when loading evo 3.1 projects with custom output templates was fixed.

• An error when loading a not correct converted evo 3.1 project was fixed.

• An error when using material textures in calculated projects was fixed.

• An error in the identification of the calculation status of an older, calculated project was fixed.

• An error when interpreting the minimum required DIALux evo version number of a saved project was fixed.

• An error in the result tool in conjunction with the Undo function was fixed.

• Some translation errors were fixed.

• An error in the output of the floorplan view in conjunction with extremely large DWG files was fixed.

• An error in the generation of automatic contours with very small angle of the contour was fixed.

• An error in the generation of inclined floor elements was fixed.

• An error in the generation of rectangular hole contours without valid coordinate system, or with an area of 0m2 was fixed.

• An error in the calculation of invalid calculation areas was fixed.

• An error when displaying the room floor plan in the results summary was fixed.

• An error in the conversion of regularity for US standards in the outputs was fixed.

• Change of evo 4.1 graphics card requirements of OpenGL3.3 back to OpenGL3.0.

• A problem displaying Imperial units in the result tool was fixed.

• An error in generating skylights in the floorplan was fixed.

• A Problem in generating polygonal calculation areas outdoors was fixed.

• An error when placing visual task areas on objects was fixed.

• An error in the outputs after loading old projects was fixed.

• A display error on Intel HD graphics cards was fixed.

• An error when loading projects with daylight calculation was fixed.

• An error when copying floors with reference lines was fixed.

• An error when drawing building openings on the roof in the front view was fixed.

• An error in display of values in the false color display in imperial units was fixed.

• Correction of the lighting power density for the US market.

DIALux evo 4.0

Restructuring GUI

• In the user interface , some changes were made. The calculation can be started now via the two buttons above the CAD. This makes it possible to start the calculation at any time , regardless of what mode you are in. The tool for lighting scene generation is now in the "light" mode. The export mode is now available at all times. The tool for creating raytracing files is now in the mode export. All tools for generating calculation objects can be found in the new mode calculation objects.

Print outs

• There is a colored floor plan, in which the building geometry, lighting, furniture and calculation areas are displayed. It is automatically visible in the room summaries. Printouts of individual calculation areas use this space view also to show the position of the surface. The calculation area is highlighted in the view.

• In the room summary the result of calculation of the reference plane, the results of EN 12464-1 surfaces are shown separately. The layout will be improved.

• Display the false color scale in the print outs

• The modeling is always visible for areas of activity in the result table.

• In the fixture part list the luminous flux of light sources, the efficiencies and the luminous flux of fixtures for relative and absolute measured photometric data are shown optional. It uses the data of the luminaires used in the project, so fixtures with different configurations are listed multiple times.

• For fixtures with different equipment separate data sheets are generated.

• The tables of calculation results in the print out gets a new layout, so that similar information can be better summarized.

The new layout is easier to read and fits better with the rest of the page layout.

• Reference values from the space profile are displayed in the print out in brackets next to the calculated values.

• The results of the main room surfaces are no longer shown separately in the room summary.

• The output "Description" is only available in the output tree, if the user entered such a description.

• Some information will appear multiple times in the output templates. For example, the calculation results of the working plane appears both in the summary and in the surface output. These redundant outputs are removed from the templates. However, the user of DIALux evo they can still select them and adjust its output individually.

• The UGR will be calculated for a range of angles in discrete viewing directions. This information is displayed in a star-shaped graph, so that the user can interpret the UGR values easier.

• The luminaire classification according to CIE, UTE, BZ and DIN will be added to part lists and the luminaire data sheets.

• The output is extended by a luminous intensity table.


With DIALux evo 4 it is possible to generate and calculate daylight scenes. DIALux takes the CIE models for the clear, cloudy and overcast sky into account. Direct sunlight is available

on request. The illuminance is calculated on real and virtual surfaces, the luminance on real surfaces, as well as the daylight factor at specific points or on an automatically generated reference plane.

New result tool

• Showing and hiding of individual calculation surfaces in the CAD is possible to obtain a better overview of complex projects.

• A general overview of all calculation surfaces will be added

• A traffic light system indicates the achievement of target values on calculation surfaces.

• A simplified scaling of the false color or iso-lines by an interpolation between a start and an end value makes these features accessible again.

• Through the use of symbols for the different types of calculations, the results will be easier to interpret.

• Selected calculation surfaces will be highlighted in the result tool. Calculation surfaces selected in the tool will be highlighted in the CAD as well.

Road lighting improvement

With DIALux evo 4 the requirements of the ROVL and NPR13201 will be considered for the Dutch market. This includes the extension of norm control center and the enhancements to the new classes and their special requirements.

• The semi-cylindrical illuminance initial disable

• Renaming the luminaire arrangements is possible

• The road elements can be identified in the planning overview by name.

Bug fixes

A lot of bugs has been fixed in the evo 4. 

Thanks to all user who helped us with their projects and comments to find and solve them.

DIALux evo 3.2

Improvement of the User interface

• Surface selection in the result tool was optimized

• Improvement of various minor layout problems

• The CAD view in the ground plan was brightened

• When using an overall maintenance factor the unused parametes are hidden

• The direction from which the light is falling on calculation areas, will now be illustrated more clearly


• Copied luminaire groups now form new groups

• The luminaire selection window is now closing after a double click

• There are less variants of apertures with the same properties

• The history of the last used windows does not grow as fast as before

• Different suspended ceilings can be selected and placed at the same time by pressing the shift key

• Energy sensors are now placed on the ceiling automatically

• When exporting DWG-files a file-name is automatically proposed

• Object and luminaire catalogues are now moved to the background by clicking in the CAD window

• The language-dependent lamp name is used in the lamp tool

• Scaled material can be used several times now


• The loading of projects was accelerated

• Room surfaces now appear in the summary of results if they are selected

• The ground area in the outputs of the specific connection value is now always calculated correctly

• The height of working plane and the wall zone are now given out in the room summary

• Luminous flux and power are nos shown in the luminaire parts list of the outputs


• The surface of the tabular street planning was accelerated

• ULR/ULOR and W/km are now shown in the outputs of the street

• ULOR, G class and "GlareIndex max. 85°" are now shown in the road table

• Road luminaires are optional shown with poles in the 3D visualization

• In the road planning luminaire variants are shown automatically

• The result table of the road can be sorted now

• The result table is now sorted by valuation fields

• The target/actual comparison is now optional to be displayed and colored

• "Additional valuation fields" have been renamed to "additional requirements"

• Valuation fields can now be renamed by the user

• Sorting of road elements is now easier

• Sorting of road surfaces was revised

• R3 and W3 are now standard road surfaces

• The planning of the road outputs were extendedby a dimensioned ground plan

• The semi-cylindrical luminance is not activated automatically in s-class grids

• The driving directions are now initially in different directions

• Road geometries can now be faded out in the scheme editor



• Bugfixing in conjunction with undo and adjustment of window dimensions

• Bugfixing of some other problems with undo/redo

Isolines and false colors

• Bugfixing in conjunction with the deletion of all false color configurations

• Changed dimming values are now updated correctly in the result tool

• An update problem with the setting of false colors was fixed

• The arrangement of buttons for false colors has been corrected

• False colors and isolines are now configurated the same way as in the result tool

Geometry and CAD window

• Representation of the connection surfaces between cut objects

• Room designations after a DWG re-import are now shown correctly

• Materials can now be properly painted on surfaces

• An error in conjunction with the finishing of dimension was fixed

• A display problem of room designations in the korean version was fixed

• Problems triggered by different DWG-file versionsare fixed now

• A problem with the storey export in DWG files was fixed

• DIALux clearly indicates on hidden, but available DWG plans

• Room designations are no longer hidden in the DWG export

• Changed textures can now be taken over again

• Problems with transparent materials are fixed

• Some problems with floor elements were fixed

• A problem with the furniture "sofa" was fixed

• A problem with the moving of text was fixed

• A problem with inserting roofs was fixed

• The sill height of windows is now adopt correctly

• The labeling of the CAD ruler was improved in the side view

• The function " adjust building opening for the wall thickness" has been removed for windows


• Bugfixing the reading of the last used luminaires

• An error at aborting a line arrangement was fixed

• The direct light visualization even works after changing the luminaire

• A problem with the representation of luminaire groups or their selection was fixed

• A problem with the import of IES files with incomplete or false data was fixed

• Improvement of the representation of luminairescomposed of several standard bodies

• Representation of light-emitting surfaces in differnet light scenes is now updated correctly

• The color of the light-emitting surfaces in different light scenes was partly shown false. This is fixed now

• The calculation of the number of used luminairesof one type was corrected

• The number of luminaires within a light scene is now calculated correctly

• After copying some luminaires did not accepted the correct mounting height, this is fixed now

• Changed lamps only were accepted if the luminaire was used in the project. This is improved now

• Some problems in conjunction with light scenes are fixed now

Road lighting

• Redundant vies has been removed from the scheme editor

• Missing isolines were completed in the road

• After multiple optimizing there could be different values. This error has been fixed


• The representation of the luminaire part list at the room summary was revised

• The representation of the luminous flux in the outputs was corrected

• GR values below 0 are now displayed correctls in the outputs


• A crash after a DIALux 4 import was fixed

• An error at converting older projects was fixed

• A crash after closing projects was fixed

• A problem according to 3DS import with different endings was fixed

• A display problem with the settings for standards was fixed

• An error in the service tool was fixed

• Various translation problems were fixed

• Newsletter was added to the menue

• The representation of an empty project list was optimized

• The start screen is now centered

• Inserting a north arrow does not force a new calculation

• The text in the setup was updated

• The installation was slightly reduced

• Different rarely occurring errors and crashes were fixed

DIALux evo 3.1

• new copy function for extracts from DIALux evo outputs into other programmes e.g. MS Word

• removal of an error after repeated Undo/Redo in the DWG tool

• correction of degrees of reflection in standard colours

• correction of various translation errors

• presentation of schematic luminaires in street planning

• deletion of street variants using the "x" button

• various small bugfixes

DIALux evo 3.0

• material visualisation in CAD for painted and metal materials

• faster output

• street calculation according to 13210 with "Tabular street planing".

• parallel planning with several schemes, e.g. different geometries or arrangements

• visualisation of the lighting effect of a single luminaire in CAD in "real time".

• evo "easy“ - a very simplified GUI enabling planning of simple rectangular spaces similar to the function in DIALux Light

• energy evaluation according to EN 15193 - It is now possible to make a 'live' energy evaluation while planning. There are options for displaying in kWh/a or Leni or showing the costs in any selected currency.

• Complete 64-bit version - the 64-bit version is not compatible with Windows XP and cannot load older DIALux projects. However there is a much larger memory for saving larger projects. In the setup it is possible to select the installation of a 32-bit version.

• HDR image export

• Numerous small bugfixes

DIALux evo 2

• Export a screenshot as a jpg. or bmp. file

• Global false colours on al surfaces in CAD

• WASD control in CAD

• DWG Export

• Big improvement in performance, stability and hard disc usage

• Shift a room and zoom without the scroll wheel(P + left mouse click = shift, Z+ left mouse click = zoom)

• New floors can be inserted between two old floors

• Set the focal length of the camera (ALT+ right mouse click)

• New colour catalogue

• One-page output

• Sequence of tools in the different modes improved


• Wrong translation

• Unclear behaviour remedied for different types of planning in the field arrangement

• Underside of the roof has a degree of reflectance of 70%

• Windows in the ground plan are now always correctly oriented

• 3D help lines visible in 2D plan

• Several floor elements can be selected simultaneously

• Textures can be scaled numerically and rotated

• The output tree has a better structure and is easier to read

• Many further bugfixes

DIALux evo 1

• Planning of whole buildings including outdoor spaces. Merging of indoor and outdoor lighting design

• Exchange of light between rooms and between indoors and outdoors

• Simplified and innovative operating concept

• Very simple building design

• Subsequent tuning of lighting scenes enables exact adjustment of the dimming values after calculation

• Rooms know intuitively how many luminaires of which type they require

• Up-to-date, fast calculation process

• Output in any paper format

• Selection of all important specifications by the norm control centre

• Scaleable interface

• Automatic room recognition

• Detailed manufacturer information

• Visualisation of transparent materials in CAD

• Calculation under consideration of reflecting materials

• Visualisation and valuation of calculation results in CAD

• Realistic building apertures such as windows and doors

• Dimensioning and labelling directly in CAD

• Via "drag and drop" it is possible to insert furniture, surfaces ( textures) and luminaires easily i into the room

• At a glance false colours provide quantitative analyses in complex geometries

• Realistic textures and furniture

• Integrated raytracing creates photorealistic impressions at lightning speed

• Calculation under consideration of transparent materials

• Planning with LED luminaires and other coloured light sources

• Planning with colour filters, coloured light sources and coloured materials

• Interactive 3D-visualisation allows you to walk around the room

• Integration of 3DS objects into lighting design

• Import and export of .dwg and .dxf files. Importing and later exporting with results after successful completion of the lighting design. No additional software required.

• Intelligent components always position wall luminaires correctly on the wall and computers on the table.

• With one click luminaires are directed at the illumination point