A universal programmed start dimming ballast platform

In this paper, a novel universal programmed start dimming ballast platform for fluorescent lamps is proposed. The proposed platform consists of an independent PWM type filament heating control circuit for filaments preheat and filament heating in dimming condition. Mathematical analysis of the proposed method is discussed in the paper. Experimental results of T8 32watt and T5 28watt lamps are presented to validate the proposed method.