The Galaxy Series is a solid choice for anyone looking for a Digital Ballast. Engineered by Sunlight Supply, these ballasts are compact can be mounted easily and get the job done. Plus they got an awesome shade of green. Take a look at the features. Galaxy Electronic Ballast Features: Operates both HPS & MH lamps. 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. Completely silent and lightweight. Extremely efficient – 99% power factor. Generator ready. 5 year warranty.