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post #5 of (permalink) Old 02-26-2013, 06:06 PM
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Join Date: Dec 2005
Location: Sacramento, CA
Posts: 19,671
The graph is obsolete, in any case. There are now so many different T5 lights available, made by so many different manufacturers, that the chart can't be correct. It was always intended to just be a rough guide, but now it isn't even good for that. See Lighting an Aquarium with PAR instead of Watts for much better information.

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