Also known as LEC this is the best lighting solution available. CMH/LEC is also proven to be longer lasting. Superior colour quality. Crisp white light. Excellent PPF value. Advanced low frequency. Square wave technology. Generates much less heat than HPS and MH. CRI of 90 makes this bulb the closest solution to sunlight available. Bulb can directly replace a 600w MH or HPS bulb in a double ended fixture. Growers report tighter inter-nodal spacing leading to better yields and a fuller canopy.