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post #32 of (permalink) Old 03-18-2013, 03:32 PM
Are these real?
Wasserpest's Avatar
Join Date: Jun 2003
Location: Monterey, CA
Posts: 15,468
Is there a direct relationship between Lumen and PAR? I am not an expert, but I thought they are two different units, and things like spectrum play a role? Like having two LEDs with the same luminous flow, one with peaks in the yellow/green area, another one more in the red/blue photosynthetically speaking more significant area ?
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