Advantages of CMH Lights
Better PAR Efficiency: A 315W CMH is about equivalent to a 400W HPS. CMH lights have a more balanced colour spectrum that wastes less energy than HPS or MH lights producing light that is not used efficiently by plants. Per watt used CMH lights have create a higher Photosynthetically Active Radiation (PAR) rating which leads to a great yield per watt.
Realistic natural lighting: The CRI (colour rendering index) of a light how well a light shows an object (or plants) true colour to the natural eye. CMH lights have a high CRI that gives your grow area a natural look and lets you see the true colour of your plants.
Longer lasting: The Ceramic arc tubes in CMH bulbs are more resistant to breakdown, so they last longer then HPS and MH bulbs. CMH bulbs are normally rated at 20,000 hours where HPS and HM bulbs are rated for 10,000
Reflector & Ballast Dimensions: 23" x 15" x 13"