Galaxy 902225 240-volt Grow Amp Ballast, 1000-watt Galaxy Grow Amp ballasts are engineered to properly power every major brand lamp in the industry They are compatible with metal halide, single-ended HPS and double-ended HPS lamps The 1000 watt ballast can operate a 1000 watt lamp at 600, 750, 1000 watts and Turbo Charge