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MH bulb change?


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i would have to agree with andy's comment. the most PAR loss is in the first 3 months and after that you only lose minimally until 18-24 months. in a study i read in reefkeeping mag. the bulbs lost 25% in 3 months. the bulbs then went from 75% to 70% in 18 months and 66% in 24 months. keep the bulb in the fixture for a while longer. if you are itching to get the most out of your bulbs make sure you have a quality reflector. that is where you get the most PAR increase....like 500-600 percent.

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