Humble grower
Well-Known Member
How do you calculate the ppfd for these cobbs? I'd like to know what I'm at with my 8 cxb3590's in a 4x3Four would be better of course, and you could dim down actually if you don't want the full 928 ppfd in that area.
You wouldn't need that much for cooling purposes, I'm not sure how much we want minimum for fresh air for the plants though. I pump heat into the grow room still, house is too cool to get that ~80℉ we want under the canopy. But I keep the fan up for smell.
You can go cheaper if you source yourself. Or running slightly lower efficiencies. 4 x cxb3070 at the same watts as cxb3590 still puts a ppfd of 830 in that sized space. Or running cxb3590 at higher wattages, 3 x cxb3590 at 63w each gets that same ppfd of 830 for 189w through the leds instead of 200w with the 4 x 3070s. Lotta different options.