You are looking at a used Lumatek 600w Dimmable Digital Ballast in excellent condition with original box. Barely used this item has been sitting in storage. Everything is in perfect working condition. More than one available. Price is for one ballast. Thanks for dimmable E-ballast have unique graduated fin design for more efficient cooling. Completely pre-wired with popular BAREF lamp cord. Up to 20 percent more lumens, faster growth, bigger harvests. Internal resin coating protects components for long life. External breaker system protects against power surges. Completely silent. 120/240-Voltage, maximum amperage 5.5 and maximum wattage 600. This product weighs 7.6-pound. This e-ballast is a performance leader. Powers both metal halide and high-pressure sodium lamps. Measures 13-2/3-inch length by 8-1/5-inch width by 3-3/5-inch height.Features & detailsDial-a-watt dimmable e-ballas is completely silentCompletely pre-wired with popular baref lamp cordExternal breaker system protects against power surgesUnique graduated fin design for more efficient coolingInternal resin coating protects components for long life