Rocket Soul
Well-Known Member
Id go for 3 boards over 2. But if you skip paying for heatsinks and shipping of heatsinks you could probably get away with 3 boards with minimum heatsinking at around 80w each for those 560 boards.
The Chinese Quantum Board Knock Off Builds
- Thread starter zypheruk
- Start date
OLD MOTHER SATIVA
Well-Known Member
interesting..the big board i had made a few years ago 6" x22" and 560 diodes
Moflow
Well-Known Member
Pity there's no price tag. Look ok.
They say they'll do custom spectrum, which is a bonus.
its.always.420
Well-Known Member
FYI Kingbrite's LM301b boards have come down a bit in price, although the listing doesn't state SK bin any longer. Down $40 for a 3 board setup.
Have any of you messed with adding UV instead of cranking the temps up? UV tubes are so.... single purpose, and I've read it's easy to damage plants with them. I was considering running a 4100 or 6000k 400w MH or a 4100k 315w CMH in between my two 300w boards, to provide some warmth and fill in the spectrum. 5x5 tent.
Have any of you messed with adding UV instead of cranking the temps up? UV tubes are so.... single purpose, and I've read it's easy to damage plants with them. I was considering running a 4100 or 6000k 400w MH or a 4100k 315w CMH in between my two 300w boards, to provide some warmth and fill in the spectrum. 5x5 tent.
Finally ordered - 2 x 560 LM561C S6 with heatsinks + separate 240-B drivers.
Should be enough for 4.5ft.
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Viceman666
Well-Known Member
I have 2x 240 driver in a 4x4 running at 520w.. i feel I could use a little more power especially on the sides of the tent so 4.5x4.5 might be a little stretch if youre planning to fill your space wall to wall with plants. If its not too late id aim for a 600 driver instead assuming your boards and heatsink can deal with the heat
4.5x2, I think I'm good.
BTW, thanks @Rocket Soul and @Moflow for suggesting these.
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mehmet Can
Member
Guys I have bought 24 of 48 samsung lm561c led boards. The supplier suggested 2 unit of hlg 240h c700b drivers. I have found elg's locally. I am a noobie on the subject. But 700 ma sounds low. What drivers would you suggest? Any advice will be highly appriciated
mehmet Can
Member
This is the the unit i purchased
Greenhouse SMD5630 led light bar Samsung lm561c lm301b S6 bin led grow light bar with meanwell driver
24 of those
Greenhouse SMD5630 led light bar Samsung lm561c lm301b S6 bin led grow light bar with meanwell driver
24 of those
Rocket Soul
Well-Known Member
Let us know how you go, i think 240w per board is a lot but you can allways add a few more boards at a later time and run them softer.
Also congrats on getting out of the planning stage, some people spend years planning what to get. Having bought several things myself and seen how little difference there is i kinda kick myself for losing time deciding for so long.
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Rocket Soul
Well-Known Member
If i remember right: forward voltage around 22V: these chips are .2w nominal, max around .6 watts. With 48 of them you will have nominal around 12w and max around 30w. If you run them at 700mA they will be around 15w or .3 w per chip which i find completely reasonable. Hlg boards are better quality, they usually have you run their boards at around .4w per diode.
Received the 560 kits. 
Didn't want to start a new thread, plus this could be relevant for new users shifting to QBs.
Have both dialled down to 165W (same as what the blurples were pulling). Plants are drooping around the 14 hour mark. With the blurple they would droop mostly in the last hour before lights out. Hanging height is 24 inches, should I raise the lights or leave them as is?
Didn't want to start a new thread, plus this could be relevant for new users shifting to QBs.
Have both dialled down to 165W (same as what the blurples were pulling). Plants are drooping around the 14 hour mark. With the blurple they would droop mostly in the last hour before lights out. Hanging height is 24 inches, should I raise the lights or leave them as is?
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Rocket Soul
Well-Known Member
Are you on 16/8 vegg? if so, am i right to say they are droopy one hour earlier? id give it a couple of days and see how the plants react.Received the 560 kits.
Didn't want to start a new thread, plus this could be relevant for new users shifting to QBs.
Have both dialled down to 165W (same as what the blurples were pulling). Plants are drooping around the 14 hour mark. With the blurple they would droop mostly in the last hour before lights out. Hanging height is 24 inches, should I raise the lights or leave them as is?
Yes, 18/6. With the blurples it was around an hour, with the 560's they seem to be getting tired or maybe stressed at around 14 hours. Raised it a couple of inches, now it's at 26.
Rocket Soul
Well-Known Member
Sounds good. Be on the look out for plant bleaching, purple stems and mag def. Whats yoir temps like? Make sure they arent to low, about 80F
25-27°C.
Rocket Soul
Well-Known Member
If you feel your giving about 4 hours too much light then yeah back them off a bit (rather than dimming, you got temps on point) and try to bring them closer slowly and up the nutes a little as you bring them closer. If you drop the light 6 inches in one go you will have probs, defs abd bleaching.