Old Reviews par vs lux vs anything else meters

Par is a measure of light weighted to how plants use it. Lux is a measure of light weighted how we see it.

PPFD(umol/s/m2) is the unit of measurement for par. Similar to lux(lm/m2).

Someone else will have to chime in on par meters. Lux meters can be used with a known conversion rate, hps for example, .0122 rate, a 60,000lux reading would be 732ppfd.
 
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