Galaxy Grow Amp 1000 Watt 600/750/1000/Turbo Charge - 120 - 240 Volt 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®. It will also properly operate 600 and 750 watt lamps. The 750 watt ballast can operate a 750 watt lamp at 6... — Ships from H: WA, CA, CO, MI, TN, PA, FL USA (No USPS)....more info.