Lightspeed Flip 4 Lighting Controller powered by Allen Bradley. Automated 2 ballasts, 4 lights switching unit, allows you to run 4 lights from 2 ballasts. Works with any ballasts plugged into any voltage. Heavy duty Lightspeed construction, these units are built to last! Can be used with any 120V timer. Save money on ballasts and use 2 ballasts to run 4 lights! Optional 240V timer outlet.