Powerbox Inc - Powerbox LSM-20 Flipbox (702995)

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, 5 year warranty.