Xtrasun BAS400A 400-Watt Xtrasun Sodium HPS Ballast
Ballast features aluminum fins, louvers and ports for extra cooling efficiency * The convection cooling on this ballast is so solid that all units include a five-year warranty * Xtrasun ballast to your indoor garden and reap the rewards without breaking your budget * This product weighs 24.3-pound * Include a five-year warranty