Dual 315W CMH Reflector w/ built in ballast People say two is better than one and we have the light to prove it! Dual 630W ceramic metal halide fixture brings you the best of high intensity lighting and efficiency in one! This horizontally mounted dual CMH provides much higher amounts of plant loving UV and spectrum, helping to make your next grow the best it can be! These fixtures are great for ALL STAGES of the grow cycle.... Note: Ballasts, Lamps / Tubes are available separately. — Ships separately from DL: Livermore, California USA....more info.