Lighting

Nwtexan

Well-Known Member
I find that without using supplemental co2,750 ppfd is about the max most of the strains I've run can handle without signs of distress.
A pair of the sf1000's will produce about 500 umoles ppf and since you're spreading that out over about 1/2 sq meters it will produce a spot ppfd of 1000 across the canopy.
That's interesting. I have always shot for around 900 or so at the top, with being ok with up to 1100 or so.
 
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