Sunburst, 315W, CMH Reflector System, Combines Sunburst & CMH Systems Into A Single Unit, Brings Ceramic Metal Halide Lighting To Small Spaces In The Compact All In 1 Format, CMH Has A Built In Digital Ballast Designed Specifically To Run The 315W Ceramic Metal Halide Lamp, Operates In The Horizontal Position, Reflectors Interior Is 95% European Hammer Tone Aluminum & Offers Excellent Uniformity & Diffusion.