To set the maintenance method and maintenance factors for the lighting installation, four steps are necessary.

  1. Selection of the maintenance method of a simplified or detailed maintenance factor in accordance with CIE 97:2005 for indoor or outdoor areas, embedded areas and open terrain.
  2. Positioning of the lighting in the selected area
  3. Adjustment of the maintenance factors for the luminaires Simplified or detailed in accordance with CIE 97:2005
  4. Documentation of maintenance factors

Step 1
Selection of the maintenance method for different types of area:

Interior areas

Evo generates an area automatically for all the rooms/spaces designed within one floor level of a building.


In order to select the maintenance method, switch to the "Area" tool. The tool can be found both in the design mode and in the light mode.


When the "Area" tool has been selected, you can click on the desired area on the right in CAD. This will then be highlighted in blue. On the left in the maintenance sector you can now select between a simplified or detailed maintenance factor.


If you decide on the simplified maintenance method, then the simplified maintenance factor will apply for all luminaires in this area.


If you decide on the detailed method, you can enter details with regard to the cleaning intervals and the ambient conditions. You will find more information on this in the publication CIE 97:2005 2nd.


The maintenance method for an indoor area has now been set. When you position luminaires in this area, these will adopt the maintenance factors of the maintenance method for any calculations.

Outdoor areas

The same applies for outdoor areas as for indoor areas. The difference between the two is that outdoor spaces are generated with the space tool outside the buildings in a site area. With the space tool you can also select between a simplified or detailed maintenance method.




Embedded areas

Evo allows you to embed or overlap areas both outdoors and indoors. The maintenance method can then be selected separately for each area. Later you can decide to which area the luminaires are to be allocated if the luminaires are located in more than one area.


Open terrain

Terrain refers to areas which are situated outside buildings where no outdoor areas have been generated. The terrain is an area which remains when all buildings and outdoor areas have been defined.


For such an area it is also possible to select a maintenance method. To do this, you have to switch to the site tool under construction and select between the simplified or detailed maintenance method. All the luminaires which are situated in this area are subject to the maintenance method of this terrain.


Step 2
Positioning the lighting in the selected areas

In principle Evo uses the maintenance method of the selected room/space as a standard for all the  luminaires within one room/space. When you position luminaires in a room/space, these automatically inherit the maintenance method selected for this room/space.


When working with embedded or overlapping or outdoor areas the following must be observed:

For the allocation of luminaires and areas Evo applies the coordinates system of luminaires.

If the coordinate system of a luminaire when viewed from above is not within the desired area, the luminaire cannot be allocated to this area.
The example shows a luminaire in a site which is shifted into the outdoor area so that it inherits the maintenance method of the outdoor area.



When a luminaire is placed in an area , the maintenance factor for this luminaire is updated. This also occurs when several luminaires are selected. If within one luminaire arrangement some of the luminaires are positioned in the one area and others in a different area, then Evo will take this into account for each of the luminaires.

Step 3

Adjusting the maintenance factors for the luminaires

After you have designed the area, selected the maintenance methods and positioned the luminaires, you can now adjust the maintenance factors in more detail. For this Evo provides a further tool "Maintenance factors" which is an element in the luminaire mode.


As a rule, the tool works with a selection of luminaires. When this tool is active you can process individual luminaires, arrangements of luminaires or any selection of luminaires via the selection frame.
When you select luminaires from a specific area there are two different setting options on the left hand side.  

Simplified maintenance method

In situations where the luminaires selected are in an room/space which is subject to the simplified maintenance method, you can select a defined maintenance factor between 0.0 and 0.1. You type this in under "Specific/Defined maintenance factor". Evo will then adopt the defined maintenance factor for the selected luminaires.


After the defined maintenance factor has been confirmed, a small lock appears to the right. This symbol indicates that you have deviated from the original standard value and have overwritten this. If you wish to recover the standard value, simply click on the lock. This will then disappear and the setting will return to the standard value.


Via the selection box above the defined maintenance factor the arrangement of the luminaires can be adjusted for your area. If the luminaire is in more than one area, the luminaire can be allocated to any one of them. In Evo a luminaire can only be allocated to one area and therefore to only one maintenance method.


After installation of Evo the simplified maintenance method is always used as the standard. You can however adapt the standard operation in the settings "File > Settings > Standards". You can select between the simplified method with a defined maintenance factor or the detailed method. When you have changed these settings, they will be adopted as the standard maintenance method throughout the design process.


It is important to know that you only change the luminaires which you have just selected. Other luminaires will not be adjusted. This also applies to luminaires which are positioned within an arrangement.  Evo enables you to adjust settings for each individual luminaire. The calculation inquires after the maintenance factor separately for each luminaire. When you select luminaires for an arrangement and have previously changed the maintenance factors for some of the luminaires, there will be luminaires with different maintenance factors within one arrangement.  Evo indicates this by displaying input boxes which have been crossed through.  


If you then enter a value in the box crossed through, this entry will then be used for all the luminaires selected.

Detailed maintenance method

If the luminaires selected are in an area with the detailed maintenance method, you can adjust further settings.

The maintenance factor resulting from a light emitting surface is the product of RMF (room maintenance factor), LMF (lumen maintenance factor), LLMF (lamp lumen maintenance factor) and LSF (lamp survival factor).  The tool allows you to adjust the settings for the room, the luminaires and the lamps. These settings are then adopted for all the luminaires which are currently selected in CAD.


The following settings for the factors mentioned above are always adjusted per light emitting surface of the luminaires. You are therefore able to adjust each light emitting surface individually.



Here Evo displays the calculated RMF (room maintenance factor). For indoor rooms/spaces you can identify which ambient conditions and which cleaning intervals have been set for a specific area. For outdoor areas pollution categories will be displayed. At the lower end of the settings list you will find a selection box with which you can shift the selected luminaires to another area. This only applies for luminaires which, according to your system of coordinates, are located in more than area.



Here Evo displays the calculated luminaire maintenance factor. You can see which settings are being used for the type of luminaire and the cleaning interval. If you change these settings, Evo calculates the luminaire maintenance factor again.


Here Evo displays the calculated LLMF (lamp lumen maintenance factor) and the LSF (lamp survival factor). You can adjust lamp details here. If you change these data, then the factors will be recalculated.



Under "Result" you will find the maintenance factor which has been passed on  to the calculation process for this light output. Under "Comments" you can enter notes which are part of the documentation. 


If you cannot find a specific type of lamp or luminaire in the selection list, then you can overwrite the factors with defined values. In the following illustration you can see which factors can be overwritten by defined  values. When you overwrite one of the factors, a lock symbol will appear on the right hand side. This symbol indicates that the standard calculation has been replaced by a defined  value. If you click on the lock the defined value will be removed and Evo will use the standard calculation again.
When you overwrite the luminaire maintenance factor, Evo displays a text field instead of a selection box. You can enter the type of luminaire here as text. This information will then be found in the documentation of the maintenance data. When you overwrite the  LLMF (lamp lumen maintenance factor) or the  LSF (lamp survival factor) with a defined value, you also have the option of using a text for the type of lamp. This is also part of the documentation.



Step 4
Requesting documentation

Documentation of maintenance factors for luminaires is at the area level. A room/space summary is generated as an overview for each area. As long as the simplified maintenance method is used for this space the defined maintenance factor will be documented in the room/space summary. 


If the detailed maintenance method applies for an area, a separate output with the name "Maintenance data" will appear in the output tree on the left. For interior areas these are subordinate to the room/space. Exterior spaces are below the open site node. The maintenance factor documentation is only generated for luminaires which are allocated to the area. As already mentioned you can adjust this via the selection boxes in the tool "Maintenance factors".



To obtain documentation for outdoor areas, a tick must be entered next to "Generate output for this site in the site tool. If this is not done, outside areas will not be displayed in the output tree.