Quietly and efficiently power 1,000-watt metal halide and high pressure sodium lamps with a 1,000-watt ION® Electronic Ballast. This versatile 120-volt/240-volt workhorse features 400-watt, 600-watt, 1,000-watt and Super Charge settings for a wide range of growing applications. Integrated circuit and thermal overload protections provide peace of mind, soft-start technology reduces lamp stress, and ignition delay resolves spikes in power draw when firing multiple units simultaneously. This ballast is RF-shielded, generator-ready and compatible with a multitude of reflectors and lamp cords. The ballast includes an 8-foot, 120-volt input power cord (240-volt cord sold separately) and a warranty of three full years. The ballast housing is 15.25 inches by 7.5 inches by 4.75 inches, excluding the removable handle.