QB288 V2 lm301b samsung quantum led lamp board . Samsung QB288 quantum board V2 LM301B Board. Board Detail : PCB size: 286*174*1.6mm, 1.0/W conductivity, PCB thickness：1OZ, Connection: 16 in Series 18 in Parallel, Power :W, Voltage : 48V, Current :mA, 288pcs Samsung LM301B Board SPECIFICATIONS Power : 120 Watts Voltage . - LED Grow Light ... Meijiu lm301h Board Free Assembly QB 288 v2 v3 Red Samsung lm301b 240w Led Grow Light, Full Spectrum Plants IR 660nm Grow Light ... Maaadro 8 Bars 1229umol/s Samsung Chips Full Spectrum High PPFD 650w Dimmable Led Grow Light for Plant Grow ...Boya 200w 240w LM301H LM301B qb288 V2 V3 V4 .-12 · Boya 200w 240w LM301H LM301B qb288 V2 V3 V4 Panel Full Spectrum SF 2000 200 240 Watt LED Grow Light, US 117 - 123.3 Piece, Lighting and circuitry design, DIALux evo layout, LitePro DLX layout, Agi32 layout, auto CAD layout, Project Installation, Seed Starting, BLOOM, VEG, Indoor Garden Greenhouse, …Sep 13, 2020 · Depending on who builds the board you are looking at.03 μmol/J for the lm301h. The lm301b tops at about.8. So there is a difference but it's subtle. Running a 3500k spectrum with either diode you will achieve about the same results (assuming all other conditions are the same).