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05-15-2006, 06:52 PM #32Senior Member
18 or 28 hour day ???
Well, i think it has something to do with the type of lighting as well. With HID lights, 18/6 is reportedly excellent. With fluorescents and CFL's, higher longer light exposure works well. It would make sense seeing as how there is a great diff. between the lumen outputs of the above mentioned.
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