ELECTRONIC BALLAST FOR OPERATING A HYBRID LUMINAIRE

摘要

The present invention relates to an electronic ballast for operating a hybrid luminaire having at least one discharge lamp (FL) and at least one LED. A pin of a conventional control apparatus (10) is used with a double function in order to switch back and forth between discharge lamp operation and LED operation: while the filaments of the at least one discharge lamp (FL) are being preheated, the signal which is applied to this pin serves to measure the preheating current, whereas after preheating, a control signal is evaluated at this pin in order to switch back and forth between discharge lamp operation and LED operation.