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(3) 54volt boards Mean Well HLG-185H-C1050B in series 170w MEAN WELL HLG-240H-C1400B in series 227w MEAN WELL HLG-320H-C1750B in series 283w

(3)54volt boards Mean Well HLG-185H-54B in parallel 186w MEAN WELL HLG-240H-54B in parallel 240w MEAN WELL HLG-320H-54B in parallel 321w Still many options depending on how many boards and how soft you run.

That's fun...there are way to many combos. You would need to know about what you want/need. (2) 54volt boards Mean Well HLG-185H-C1400B in series 150w MEAN WELL HLG-240H-C2100B in series 227w MEAN WELL HLG-320H-C2800B in series 302w

It depends on what you want. Do you want to run them hard or soft? If you want to run them hard you can use the -54B version. If you run soft I would run a constant current model or if you want to run in series. Running the -54B model in parallel will get you to max output for either model 240...

horticulturelightinggroup.com/collections/diy/products/qb288-quantum-board That's the chart for 54v Maybe you didn't refresh your page.

https://horticulturelightinggroup.com/collections/diy/products/qb288-quantum-board Right here

My space is actually a sealed room with flat white walls and I'm toying with co2 now. I'm thinking about switching to vertical and using two 7'x6' walls like ttystikk. Trying to increase my lbs/year.

That is about 1.4g/w which is good on that metric but I am looking to maximize 4x4 spaces in output. I think in that case I would need about 640w at 1.4g/w. I see growmau5 did it with that Canopy 10.

I don't have the exact figures but I think your current COBs have 50% or higher eff. so you have 38w/sq ft which would be 19+par watts/sq ft. Going down to 14+par watts per sq ft. "Fingers Crossed"

The above quote was 320 actual watts and you said twice that would cover 24 sqft. (640w). That would be about 14par watts (25.8real watts)per sqft. which seems fairly low. 333par watts total. Until there are enough posted FULL/COMPLETE grows we won't know until we know. Hopefully you are correct.

333par watts over 24sqft. sounds like a fish tale. Lol!

Based on COB tech that's a good sweet spot over 18par watts per sqft.

https://www.rollitup.org/t/quantum-boards-grow.927065/ 4 boards 245watts and he had some issues but still pulled over 1g/w.

How tight are the nodes under the QB? I can get great size under an HPS but the nodes are tighter under MH. How does the QB compare.

Until we have enough real world application to look at we only have theory for the most part based on COB tech. We may find that 15 par watts per sqft will rival a gavita. Time will tell. Thanks for the feedback.

I think he said it was a little low and I agree, at least from theory.

Fans seem like more of a hassle. I like the passive heatsink route. Advantages over COBs... Not as hot Higher lumens/watt Nicer spread

Hard to watch, Growmau5 seems too blown and scatter brained today.bongsmilie

Quantum Boards are rated at 3000mA max. If you have slate 1 sink then 2100mA is about max. according to what I read.

1050mA on the QB304 is about 114w 2100mA on the QB288 is about the same Volts x Amps = Watts