This Galaxy® Select-A-Watt® ballast can operate a 1000 watt lamp at 600, 750, 1000 watts and Turbo Charge®. This ballast will properly drive 600, 750 & 1000 watt lamps. Set the desired wattage on the Select-A-Watt® dial and install the correct lamp. Comes pre-wired with a dual universal lamp cord receptacle. Includes a 6 foot 120 volt power cord. Purchase a 240 volt power cord separately (#903082). The Legacy® ballast runs on 120-240 volt power. This ballast has an extruded aluminum housing that is very lightweight. It features soft starting and fan cooling. The Legacy® ballast is extremely efficient at 99.9%.