What is your PPF with this set up??
there is simply no way my plants can take more than 2 320 watt
HLG 3 Quantum board set ups in a 4x4 area, I do not have a meter but even Jacks Nutrients at max strength just barely keeps up with that much light & we are talking only 40 watts per ft2.. No way in heck would I put more light on em, & the 2 fixtures need to be a good 24" high to not fry the plants.. I do not run co2 so that could change things but with no co2 I do not believe you are gaining squat with say 50 watts per ft2 over 40. Or maybe kingbrite boards are that much different than the
HLG's??? Wattage really means nothing to me, PAR meters do not lie & plants do not lie either & 40 watts of
HLG Rspec LED's per ft2 is pushing the limits bigly without co2 (easily over 1000 PPFD). I have been at this for over 20 years & certainly going from say 30 watts per ft2 to 50 watts per ft2 with HID is fantastic but going from 40 watts per ft2 to 50 watts+ per ft2 with the
HLG boards I'm using would only hurt my plants & hurt em pretty good I bet..
your set up is what like 675 watts ish maybe 700 tops? In a 3x3? but yet I bet you are under 1100 PPFD. I am definitely pushing very near 1100 PPFD with 6 quantum boards in a 4x4 & that is only taking the
HLG's 40 watts per ft2 to achieve