Thread: Aquarium light
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Old 04-02-2004, 08:06 AM   #4
Liath
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Join Date: Aug 2002

Location: Ann Arbor, Michigan
Posts: 637
3 watts per gallon is the recommendation for a heavily planted tank. I have about half that, and my plants seem to do ok. Some plants have much higher light requirements than others, so I try to use plants that only need low to medium lighting. I use two Hagen 15 watt Life-glo lights for my 20 gallon tank. These are full spectrum lights with internal reflectors. Kind of pricey though.
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