Its old tech these days (sounds weird to say). Cobs are way better because they have a spectrum closer to what the sun puts out, at a much lower wattage. My mars pull a little less than 600 watts from the wall....a set of the autocobs will pull about 210 watts, and the plants seem to love them, from what I've seen. On top of all that...the autocobs cool passively (using just heat sinks, no fans)....if a fan dies on my light, it will burn itself out in probably less than an hour....