The Planted Tank Forum - View Single Post - watt/g rule: with or without reflector?
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Old 01-18-2007, 08:44 PM   #7
Are these real?
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Originally Posted by Nix View Post
In a nutshell if someone says he/she has 2w/g it can mean anything from low light to high light, depending on the bulb/reflector system?

It's really rough, this rule.
You got it.

Another glitch is the tank size... the rule is not totally linear. For smaller tanks, 2W/gal could be low light, while for large tanks it could be high light. There is also a "threshold" for really small tanks. Don't try to light your 1gal nano with a 2 Watt bulb!
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