The Sunlight Supply Galaxy Electronic Ballast feature the exclusive Smart Volt feature. It operates on both 120 volt & 240 volt power. Simply unplug one cord and plug in the other. Six foot 120 volt power cord is included, purchase 240 volt cord separately. Electronic ballast saves energy! Uses 5-12% less energy than magnetic H.I.D. ballasts depending on lamp specification. The Galaxy electronic ballast drives lamp to peak performance. Made of Anodized, extruded aluminum housing they are lightweight and easy to handle. The Galaxy electronic ballast will operate either HPS or MH lamps. Rubber feet reduce noise and vibration so it is silent while operating. Built in short circuit protection as an added safety feature. These come wired with Sunlight Supply's standard female lamp cord receptacle that accepts Sunlight Supply's patented male lamp cord making these units compatible with all Sun System reflectors. Comes with a 5 year warranty, 3 years full with an additional 2 year pro-rated. This is the ballast only.