This Sun System Digital fixture is a state of the art fixture will run both 250 & 400 watt lamps. The integrated electronic ballast allows operation of both metal halide (MH) and high pressure sodium (HPS) lamps. The proprietary Smart Volt ballast operates at 120 – 240 volts (120 volt cord included). Lightweight (only 15 lbs) and easy to set up. Highly reflective aluminum insert. On/Off switch. Powder-coated steel housing is attractive and durable. Purchase your choice of lamp separately. If you need assistance in determining if this device is right for your set up give us a call and we will be happy to assist you!