Two fluorescent lamps connected in series are operated with just one Ballast. Since each lamp only receives half the voltage, a 110 V starter must be used with each lamp. This type of circuit is only suitable for use with the following lamp-ballast combinations:
|TC-L 18 W
The circuit is not compensated. If ignition time for luminaires on a tandem
circuit is too long, simply reverse the polarity of one of the starters (turn
the starter through 180° and replace).