Sometimes also called Light Emitting Ceramic (LEC), these are a variation of metal halide (MH) lights which use a ceramic arc tube. Hortilux uses a glass that allows the UV light to pass through benefiting plant growth. Here are the 9 reasons we think LED wins over Metal Halide. The main difference is it uses a ceramic arc tube like an HPS grow light, which makes it more electrically efficient. Efficiency of CMH vs. Remember, metal halide bulbs degrade relatively quickly and lighting systems are designed to take that into consideration, as should you when selecting your LED bulbs. We have talked extensively about traditional HID grow lights and LED grow light systems, but there has been a recent trend growing with a 3rd grow light system you might not know about: Light Emitting Ceramic, or CMH grow lights that utilize ceramic metal halide grow bulbs. Light Emitting Diodes (LED) are more energy-efficient compared to CMH light. LED Grow Lights vs. Ceramic Metal Halide (CMH) This is an improved version of a Metal Halide grow light. Ceramic Metal Halide lamps are 10-20% more efficient than the traditional quartz metal halide and produce a superior color rendition. Even if they share a lot of the same technology they have fundamental differences in the way they’re constructed and how they operate. The LEC(light emitting ceramic) or cMH(ceramic metal halide) maybe the answer for those looking for the intensity of an HID but want the low energy cost and cooling needs of an LED or fluorescent fixture. LEDs emit a lesser amount of heat compared to CMH lights. You can go to their web page to view the raw data. While these units generate about as much heat as a typical LED, they most certainly out preform their HID equivalent of a 400W – 600W MH/HPS. Trying to do so would be very dangerous. As a result, CMH bulbs are more efficient than regular MH lights. First of all, Ceramic Metal Halide and Metal Halide bulbs are not the same thing. Modular solid-state lighting (SSL) engines allow luminaire manufacturers to quickly add LED technology to existing product families and the Cree LMH2 is designed for use in fixtures that have used high-output HID lamps such as 70W ceramic metal halides. Ceramic Metal Halide grow lights and LEDs have the following differences. Try Prime ... Grow Solution 315W CMH CDM Ceramic Metal Halide Grow Light Kit w/3100K Bulb 120/240V Replace LED Grow Light for Indoor Plant Growing (CMH 315W (Open)) 4.5 out of 5 stars 2. CMH vs. MH. ... Nebula's ViparSpectra LED vs 250W HPS Showdown! This is a quick take on MH vs. CMH lights. Your guide to #ceramic metal #halide #GrowLights You must be 19 years of age or older to enter this site. FREE Shipping. LED grow lights last many times longer and contain no toxic mercury! You can’t just use your new CMH bulb in your old MH ballast. Ceramic arc tubes allow higher arc tube temperatures which result in better efficacy, color rendering, and color stability. For comparison purposes, the only disadvantage I can think of CMH over MH is the initial cost. Cree announces LED module to replace 70W CMH and save 50% in energy. Ceramic Metal Halide (CMH) grow lights, including LEC grow lights and other ceramic discharge metal halide (CDM) systems are quickly becoming the most popular choice among commercial and hobby growers. CMH Grow Light Expert Guide | Best Ceramic Metal Halide Lights for GrowersCeramic Metal Halide Lights or CMH Grow Lights are fitting for most indoor growers, indoor vegetable gardeners, or other plant enthusiasts who have a grow room.