The Philips HF-P 154/55w T5/PL-L is a fixed output high frequenct ballast for use with 1 x 54w flourescent lamp or 1 x 55w PL-L lamp. This ballast has a flicker free warm start, electrode heating cut off, Low energy consumption and automatic stop circuit (stop start). The Philips HF-P is often used in Department stores, Airports, Railway stations, Hotels and Hospitals. It is also suitable for emergency installations.