What's my wpg? - The Planted Tank Forum
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post #1 of 2 (permalink) Old 05-30-2005, 07:24 PM Thread Starter
Algae Grower
Cord's Avatar
Join Date: Sep 2004
Location: Lansing, Michigan
Posts: 91
What's my wpg?

Okay, this may be a really simple question, but I don't know the answer.

I have a 30" light sitting over a 10g tank. (Long story involving moving in a very small car. I'm just trying to make things work with what I have right now.)
The light is 65w.

So, because roughly only half of the light is actually over the tank, does that mean that my tank is getting 3.25wpg? Or is it still getting 6.5wpg?

If anyone can explain the science behind the answer, that would be great.
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post #2 of 2 (permalink) Old 05-30-2005, 09:58 PM
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Join Date: Dec 2002
Location: Portland Orygun
Posts: 9,600
If the light is not getting into the tank then it doesn't count.
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