Lighting requirements
I'm curious about the "2 watts per gallon" rule.
First, different lighting technologies produce significantly different amounts of lights (lumens) per watt. So how can there be a simple rule like "2 watts/ gallon"??? Right now I have 3 x 55 watt CF on a 75 gallon tank. This works out to the "2 watts/gallon" rule, and in practice the plants grow quite well (what the Tiger Oscars don't dig up). I'm setting up a 38 gallon tank for my daughter's classroom. I have some 20 watt flourescent bulbs (the kind that comes with tank setup). I'm interested in how these compare with CF lights in terms of lumens/watt and how the "2 watts/gallon" rule applies. /harry |
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