The 315-watt ION® Electronic Ballast CMH is designed for use specifically with ceramic metal halide lamps. A microprocessor provides highly efficient power while the lower operating frequency produces minimal electromagnetic interference. Also includes hot restrike prevention; thermal overload and circuit protections; soft start technology and staggered ignition; and end-of-lamp-life recognition technology for optimal performance. This USA-FCC- and CSA-certified ballast is generator-ready and features a three-year warranty. Compatible with 120/208/240-volt operation; 8-foot, 120-volt power cord included.