The Hydrotek LIGHTSPEED FLIP8 can control 8 lights from 4 ballasts with up to 4 lights on at a time. Designed to work with ballasts of any voltage, these heavy duty controllers are built to last. 4 ballast. The Hydrotek LIGHTSPEED FLIP8 can control 8 lights from 4 ballasts with up to 4 lights on at a time. Designed to work with ballasts of any voltage, these heavy duty controllers are built to last. 4 ballast cords on one side and 8 reflector plugs on the other side. Save money by using half as many ballasts!