Growers House now carries Ceramic Metal Halide lamps from Growers Choice, Philips, Nanolux, Ushio and more. These are a relatively new source of HID light that is a variation of the traditional Metal Halide HID lamp. CMH lamps use 20% of the power of comparable incandescent light bulbs for the same output (80-117 lumens/watt) and retain their color spectrum better than most other gas discharge lamps, making them a great option for indoor grow lights. The ceramic tube’s unique design is an advantage in comparison to the fused quartz tube in standard MH lamps. This Ceramic tube and the metallic atoms within it create a bluish light that is close to daylight with a CRI (color rendering index) of up to 96.