DIY with Quantum Boards

I would think the odds are low, you'd have to blow whole strings to have a problem.

garyocampo said:

so, hope i'm not bothering anyone, but does anyone have any opinion on running 10 parallel series of 10 LM561c and the chances of thermal runaway?

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pop22 said:

I would think the odds are low, you'd have to blow whole strings to have a problem.

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If you use A type driver you can adjust voltage so that if a string goes the driver will limit the voltage thus limiting the current if a string fails. If not going Meanwell I would use the Samsung tool and see if I could fill up the drivers voltage . This way if a string fails it won't provide additional current.

thank you so much!!!!!!!!!!!

Thank you for the input Stapenj37826

Would one of these 90w kits be enough to match or better a 130w CFL?

DISTRESS0R said:

Would one of these 90w kits be enough to match or better a 130w CFL?

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Much better.

Don't be surprised with yield increasing threefold.

frica said:

Much better.

Don't be surprised with yield increasing threefold.

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Cheers! I actually didnt realise the thread was 100+ pages long, so ill start reading through

DISTRESS0R said:

Cheers! I actually didnt realise the thread was 100+ pages long, so ill start reading through

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In microgrows where people have replaced their CFLs with LED bulbs (+diffuser removed) you can generally expect the same yield with 1/3rd the wattage.

The QB is a lot more efficient than the average LED bulb.
Those new leds really put a beating on even the most efficient CFL.

I use CFLs with COBs, about 1w of CFL to 4w LED. I know it's less efficient but it just seems to help. I use the 2700k CFLs, then for the last 2 light cycles before harvest I switch them to lizard CFLs of similar wattage.

What is the lowest wattage people are running these boards at? Anyone running them at less than 50 watts in flower and getting good results?

brewbeer said:

What is the lowest wattage people are running these boards at? Anyone running them at less than 50 watts in flower and getting good results?

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Good question... and what driver would be the best for 50w? @robincnn

eminiplayer said:

Good question... and what driver would be the best for 50w? @robincnn

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I would get the HLG-80H-C700 and dim it down to 50W if using single board.
Same driver as 90W kit

For 2 boards in series 50w each hlg-120h-c500

I just hang 2 boards in my 3x3 yesterday, AMAZING!

Insane amount of light at ~700ma from the HLG-185H-C1400, dialed all the way down. Every inch of the area is completely lite up.

Well, it will produce three times as much light as the CFL and 50% less heat so you be the judge! Considering thos big cfl lose 20-30% of their output in 3-6 months vs years for an led, which is truly cheaper to use?

DISTRESS0R said:

Would one of these 90w kits be enough to match or better a 130w CFL?

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HLG-240H-C1050A with Slate 2 Double/Driver Combo
2x 3000K Boards
250W
With type A the current goes as high as DC 1.22 amps and almost 300W max at wall. I recommend staying at 250W if driver mounted on top of heatsink.

https://northerngrowlights.com/collections/all/products/slate-2d-2x-qb304-board-heatsink?variant=30287106696

Photos

pop22 said:

Well, it will produce three times as much light as the CFL and 50% less heat so you be the judge! Considering thos big cfl lose 20-30% of their output in 3-6 months vs years for an led, which is truly cheaper to use?

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I am wondering if one board could be used to veg about 12 teens.

Any idea when the $149 kit will be in stock? I wish RIU would get the pictures back up.

MMJ Dreaming 99 said:

Any idea when the $149 kit will be in stock?

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Taking orders from 15th Feb. ships in 2-3 days

It's been awhile since I've had to run PPF numbers, so could someone check my math on this?
3 boards ran at a total of 2100mA or a HLG-240H-C2100A in a 8 sq ft area
A total of 2010.5 PPF or 1494.24 PPF per m^2

Can two boards be run in parallel using an HLG-80H-700A driver?

brewbeer said:

Can two boards be run in parallel using an HLG-80H-700A driver?

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Yes
Use 120-1050 or 120-1400 for little more power.