some measurements and specs for those interested in diy qb120 lighting Qb120 specs HLG-240H-2100a driver per 4 boards 250 watts draw 2430ma (4) qb120’s per light 24.15 volts per board 58.68 watts per board 2430(milliamps)x 24.15(volts)=56.68 watts per board Efficacy is 2.5 umoles/joule 58.68 x 2.4 = 146.7ppf x 12 boards= 1760.4 ppf ***PPFD IS BASED ON 12 boards in 4x4*** 1760.4ppf / 1.6 sq/m (4x4) = 1100.25 ppfd 65,000 lux at 12” 1100.25 ppfd / 65,000 lux = .017 conversion factor *****RESULTS***** ***.017 conversion @ 250 watts Wall draw and 234.72 watts output (based on 2.5 umol/j*** Ppf at 12” above canopy 65,000 lux x .017= 1105 ppfd Ppf at 16” above canopy 54,000 lux x .017= 918 ppfd Ppf at 20” above canopy 39,500 lux x .017= 671 ppfd
Awesome thanks for the specs do you think I could use 4 qb120s with a hlg120 driver in a 2x2x5 tent and have enough intensity? ( be running it max at 150watts during flower)