Galaxy Grow Amp 1000W Select-A-Watt 600/750/1000/Turbo Charge Ballast (Model: #902220) Operate a 1000 watt lamp at 600 watts 750 watts1000 watts This ballast will properly drive 600 watt HPS / MH 750 watt HPS and 1000 watt HPS / MH lamps Set the desired wattage on the Select-A-Watt dial and install the correct lamp Galaxy Grow Amp ballasts come pre-wired with a Sun System lamp cord receptacle.