The Flipbox? LSM-20 is 10 ballast, 20 light Flipbox that allows you to run 20 lights from 10 ballasts. Paired with a DPC-15000 and 10 electronic ballasts, you can run 20 lights from just 50 Amps at 240 Volts. Convenient single unit with built-in timer allows for complete automation of switching between 20 lights from 10 ballasts. Voltage independent - works with 120 Volt and 240 Volt ballasts. Fits Sunlight Supply? style ballasts. Detachable trigger cord can override the built-in timer so Powerbox? can be controlled by your own timer or other devices. Hand-built at their California factory.