Lightspeed Flip 20 Lighting Controller powered by Allen Bradley. Automated 10 ballast, 20 light switching unit, allows you to run 20 lights from 10 ballasts. Works with 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 10 ballasts to run 20 lights! Optional 240V timer outlet.