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I can only run my 4000 @ 50% or it will be well over 1000 ppfd. I don't use a tent. Sry guess I missed your posts. 1000 ppfd is max, it's actually a lil too much unless you are using CO2. (in flower)  500 ppfd is max in veg. And my light is 32"+ above my canopy. Hope anything I said helps.