Z ziggystardust74 Active Member Apr 9, 2008 #1 is there anyway to figure out how many lumens your plants get back from reflective surfaces?
atavistic Well-Known Member Apr 9, 2008 #2 I'd guess you could buy a light meter. Take readings with reflective surface and without. The difference would yield reflective surface addition over baseline.
I'd guess you could buy a light meter. Take readings with reflective surface and without. The difference would yield reflective surface addition over baseline.
