If you want to grow plants, stop looking at Lumens and start looking at PAR. Lumens are for Humans: Lumens measure how bright a light looks to the human eye. Because our eyes are very sensitive to green light (which plants reflect rather than use), a “bright” light might actually be useless for growth. PAR is for Plants: PAR (Photosynthetically Active Radiation) measures the actual...
The LED Light Tech Deep Dive: PAR vs. Lumens
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