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hps and mh

Discussion in 'Growing Marijuana Indoors' started by throatcream69, Dec 28, 2012.

  1. Do HPS usually run at a slightly higher temp than metal halide? i was just wondering because i got a used bulb off a friend and wasnt sure if it was a little burnt out or not since it was running a little cooler and didnt seem as powerful as hps. im only talking about 5 degrees difference tho.

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