This cutting-edge digital fixture will run both 250 & 400 watt lamps. The integrated electronic ballast lets in operation of both metal halide (MH) and prime pressure sodium (HPS) lamps. The proprietary Good Volt® ballast operates at 120 – 240 volts (120 volt cord included). Lightweight (simplest 15 lbs) and simple to set up. Highly reflective aluminum insert. On/Off switch. Powder-coated steel housing is horny and sturdy. Purchase your number of lamp one at a time.