This professional UL-approved grow light is constructed of 18-gauge steel and finished with a three-stage, bright white powder coating. The reflectors edges are fully sealed and lined with an ultra bright, optical grade hammertone insert. A tempered glass safety lens is also included with each fixture. The external ballast is cooled by ventilation slots and includes a 10-foot grounded power cord. A metal halide or high-pressure sodium Phillips bulb comes standard with each fixture. Bulbs range in output from 250-1,500 watts. All light fixtures are backed by a five-year warranty.