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The Philips MasterColor ceramic metal halide 315 watt CMH bulb offers an outstanding level of light quality and growth performance. The lamp’s sparkling white light creates a natural full spectrum for maximum growth. In addition the high efficiency of the 315w lamp ballast combo means reduced energy use and a lower cost of ownership compared to a 400W Metal Halide HID grow lights. Works well in AgroMax HyPAR 315w CMH grow light systems. Ceramic Metal Halide lamps run cooler than HPS and MH lights while also putting out far-red and UV light.