Simplifying the logistics of lamp design this electronic ballast offers automatic lamp recognition of both High Output and High Efficiency TL5 fluorescent lamps. Designed for 3 x 28/35/49/54w Watt luminaires it is an ideal solution for applications where energy efficiency is paramount and high level switching is the norm. The Philips High Frequency Performer Intelligent range features programmed flicker free start constant light irrespective of mains-voltage fluctuations and automatic restart. This gear is suitable for class 1 outdoor applications and indoor installations such as offices hospitals supermarkets and schools.