CMH grow lights are made with an arc tube constructed of a ceramic composite instead of quartz or PCA. This allows the tube to reach a higher temperature. The higher operating temperature of the ceramic tube allows for an ideal mixture of gases. This creates a fuller spectrum of light that increases the growth, overall health, and yield of your plants. Ceramic Metal Halide grow lights, including Ceramic Discharge Metal halide and Light Emitting Ceramic (LEC) grow lights are becoming popular amongst commercial cultivators and hobby growers because they use up to 30% less energy and provide the same PAR/watt or PFF performance as traditional MH & HPS grow Lights while also producing less heat which requires less grow room air conditioning.