MIMedGrower
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My room on average yielded 5 lbs from 4 1k sodiums, but running 480 + 640 +480 watts worth of LED (480 watts worth being chinese junk led's) & a 1k sodium I yielded 6 lbs.. so with me 4000 watts = 5 lbs....but with 2600 watts (480 of again being kinda of junk & 1000 being sodium) I got 6lbs right off the bat with no dialing in at all.. those are the facts & it has only gotten better with dialing it in!
Thats more what i expected. 20-25% yield increase for the same watts.