I have 3 in total to sell $100ea. OBO Note: Also selling Matching Reflector hoods and bulbs!!! Product Description Galaxy Features: Drives lamp to peak performance. Saves energy Uses 5-12% less energy than magnetic HID ballasts depending on lamp specification. Efficient - 99.9% power factor. Soft starting - increases lamp life and reduces lumen depreciation. Anodized, extruded aluminum housing. Lightweight - 400W weighs 11 lbs./600W weighs 14 lbs. Can ignite both HPS MH lamps. Very quiet operation. Instructions and warranty information included with every ballast. Rubber feet reduce noise and vibration. Constant wattage output - no lamp flickering. 15 BGH/Sunlight Supply Lamp Cord sold separately. Socket assembly sold separately. The socket assembly you choose should match the reflector you are going to be using with your Galaxy ballast. Galaxy Electronic Ballast Features: Extruded aluminum housing is engineered to dissipate heat and keep the components cool. Smart Volt feature allows ballast to run on 120, 208 or 240 volt power. Detachable power cord allows easy change over. Comes standard with 120 volt cord, purchase 240 volt cord separately (Part #903082). Resettable circuit breaker for short circuit protection. Lamp cord receptacle compatible with all Sun System reflectors and sockets. Operates both HPS MH lamps. Completely silent and lightweight. Extremely efficient -- 99% power factor. Generator ready.