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02/10/2006, 11:20 AM
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Registered Member
Join Date: Nov 2004
Location: Hayden, Idaho
Posts: 89
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Lighting Intensity vs Height over Tank?
Does anyone know of a calculation or rule of thumb that equates light height changes with intensity changes. for example, if my 2X250 MH lighiting is currently at 8" above my water level, what percentage of intensity gain do I get by lowering by 1" to 7"?
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