The Philips HF-P 218 PL-T/C is a non-dimmable high frequency ballast to run: 2 x 18w lamps.This ballast has a flicker free warm-start circuit,50% longer lamp life and an automatic stop circuit (safety stop). The Philips HF-P PL-T range is suitable for Department stores,Suprmarkets, Hotels and Hospitals, It is also for use in emergency installations with re-ignition.