Quietly and efficiently power 600-watt metal halide conversion and high pressure sodium lamps with a 600-watt ION® Electronic Ballast. This 120-volt/240-volt versatile workhorse features 400-watt, 600-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. It includes an 8-foot, 120-volt power cord (240-volt cord sold separately) and a warranty of three full years. The ballast housing is 11.5 inches by 7.5 inches by 4.75 inches, excluding the removable handle.