The Chinese Quantum Board Knock Off Builds

Rocket Soul

Rocket Soul

Well-Known Member
ANC said:
UV is very tricky to use correctly without letting the tops of the plants mature way before the rest.

There seem to be 2 schools of thought. One leaves a 24 Uv free period between each UV application to avoid building up UV resistant pigments, the other only applies UV in the last 2 weeks when the buds only have building and ripening left.
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3rd school: uva from the start in increasing dosis, uvb only for last part of veg and in flowre for an hour or so. Nachooo tried this to great effect, tgere was some bleaching but good results. Bud was only smoke tested but gave cold sweats...

Also: try meijiu and kb for boards: lm301bs are usually under 30. I prefer just white no reds or uv or bells on them.
 
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borban72

Member
Rocket Soul said:
I wouldnt know. Im a "build it" guy so preder just to add some strips or monos
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THANK YOU FOR ALL FOR ALL THE VALUABLE INPUT.

I was looking at this AliB listing Company Geeklight Optoelectronics

Alibaba Manufacturer Directory - Suppliers, Manufacturers, Exporters & Importers

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Their product are on the expensive but sofifisticated end of the product range and seem very legit to me. Does anyone has experience with them, their products? Bluetooth programability does exactly what most of us is looking for here ( timers set to turn on / off light chanels at preset times) .. unhopefully they still tell that the upgraded 2.0v of theior bluetooth adapter / control is not ready yet. UV 395, IR 730 chanels are independently controlable , but not the FR 660. Interesting.

Does anyone has experience with them, their products?

Take a look at this product demostration .. quite convincing.

 
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borban72

Member
borban72 said:
Hi! I'm newbie with QBs....I need some experienced advice on the new KB 480 w set with QB272 PCB: 3.0/W conductivity, 2OZ copper thickness but only 4mm thick heatsink ( 240 W unit has 10 mm thick heatsink) .. so the 480 W QB272 now has 1024 pcs of LM301H (either 3000K or 3500K) + 40 Cree Xpe 2 660 + 16 pcs Cree 730 + LG UV... the QB288 was not separately switchable Reds and had no IR and UV but had 1008 LM301H + 144 Cree 660 Reds ... ahaghhg .... this is driving me crazy ... need to set up a 6"x7" flowering room ... controling strech is in the focus and durability that might correlate with good thick heatsink .... for vegging KB suggested theh same QB272 swithchable reds and UV but with 4000k H301H .... your input will be greatly appreciated on what to pull the trigger
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Regardingthis post of mine... why KB is highlighting bold QB272 PCB: 3.0/W conductivity, 2OZ copper thickness .. can someone pls explain why is that special, what is the advantage?
 
Rocket Soul

Rocket Soul

Well-Known Member
Thicker copper trace is better at sucking the heat out of the led chip. The 3.0/w i never quite got explained or understood.

I think the values are quite standard. But i know its quite easy to pretend your trace is thciker than it is, iiuc youd need to cut the board in half or desolder leds and compare weight with another board with the same layout.

To be honest id never trust them too much, especially in these days of super low prices. I got into this cause i saw tests here on the forum. @Moflow is still or measurements/par maps guru, ive not seen a single person do comparison tests between different companies boards for a very long time. He deserves a lot of props. Also if anyone wanna see what cheating at growing and physics look like go and see him grow led weed at half the recommended temps. Dont know how hes able still impressed.
 
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borban72

Member
Rocket Soul said:
Thicker copper trace is better at sucking the heat out of the led chip. The 3.0/w i never quite got explained or understood.

I think the values are quite standard. But i know its quite easy to pretend your trace is thciker than it is, iiuc youd need to cut the board in half or desolder leds and compare weight with another board with the same layout.

To be honest id never trust them too much, especially in these days of super low prices. I got into this cause i saw tests here on the forum. @Moflow is still or measurements/par maps guru, ive not seen a single person do comparison tests between different companies boards for a very long time. He deserves a lot of props. Also if anyone wanna see what cheating at growing and physics look like go and see him grow led weed at half the recommended temps. Dont know how hes able still impressed.
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Thank you. I will opt for 240 W units that is small enought to distribute light evenly as per my calc from PAR maps. Just one more question as I see you are very experienced. I noticed your affection for 2700 K color .... BAVA 240 W usnit is built up of 192 diods of 2700K +320 diods of 4000K .... plus 660 reds + 730 Ir + UV all these last 3 swithable (BTW my freind tells me is is easy to attach a timer on each channel)... turning OFF 660 + IR and UV will make this unit suitable for vegging at abt 20 watts/ sqf ... wont the 2700K cause strech? .. and also the other side of the coin, 2700 + 4000 in the above mention proportion is ideal for flowering? Would a single color 3000k or 3500k + reds more appropriate? I'm very interested in your opinion and what is yur experience on this.

BTW I attach here the BAVA PAR mapping (source from MIGRO) .. nice .. the black regtangle is the board sizeBAVA 240.jpg
 
Rocket Soul

Rocket Soul

Well-Known Member
borban72 said:
Thank you. I will opt for 240 W units that is small enought to distribute light evenly as per my calc from PAR maps. Just one more question as I see you are very experienced. I noticed your affection for 2700 K color .... BAVA 240 W usnit is built up of 192 diods of 2700K +320 diods of 4000K .... plus 660 reds + 730 Ir + UV all these last 3 swithable (BTW my freind tells me is is easy to attach a timer on each channel)... turning OFF 660 + IR and UV will make this unit suitable for vegging at abt 20 watts/ sqf ... wont the 2700K cause strech? .. and also the other side of the coin, 2700 + 4000 in the above mention proportion is ideal for flowering? Would a single color 3000k or 3500k + reds more appropriate? I'm very interested in your opinion and what is yur experience on this.

BTW I attach here the BAVA PAR mapping (source from MIGRO) .. nice .. the black regtangle is the board sizeView attachment 4471427
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Without complicating things too much on the answer: mixed white spectrum on the same channel is no point, just go for 3000k or 3500k. You may wanna leave uv on in vegg, build some tolerance ot will also work against stretch.
 
coreywebster

coreywebster

Well-Known Member
[ZooWeeMaMa] said:
These Aussie lights have me really intrigued but are they really worth that much more money? Thinking about grabbing some of those when flowering time comes.
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They have a great spectrum, high cri and seem to be performing well from the tests ive seen. Also have a good spread of light been bigger boards.

I got 4 of them before they were announced as a company, one of the guys behind them is a well known guy on here, Need to run more strains im familiar with to see how much difference there is.
Plants do seem to finish a bit quicker with the high cri set ups.
 
[ZooWeeMaMa]

[ZooWeeMaMa]

Well-Known Member
This isn't really Chinese board related but kinda is... Anyways, what do you guys use to know how many watts you're using on each board?
 
Rocket Soul

Rocket Soul

Well-Known Member
[ZooWeeMaMa] said:
These Aussie lights have me really intrigued but are they really worth that much more money? Thinking about grabbing some of those when flowering time comes.
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Might be worth mentioning theyre bigger and more diodes than 288s, theyre 8x16" with 400 diodes, compare price with approx 1.4 boards.

Im pretty sure there are riu discounts and theres also discounts for ordering in bulk, maybe group buy with someone.

I agree with corey on 90 cri, its pretty clear when you see them grow next to 80 cri.

Edit: maybe i should clarify: 2700k 90cri white diodes. You can also get to 90cri by adding red but i dont feel this does the same thing to the crop. You can also grow with other ccts: 3000k (havent tried it) or even 4000 k 90 cri (flowered more or less like 3000k 80cri). Low K, high cri from white chips is the ticket.
 
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Moflow

Moflow

Well-Known Member
[ZooWeeMaMa] said:
Russell is the brand? They on Alibaba?
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