The Chinese Quantum Board Knock Off Builds

[fragileassassin]

Do you understand how this switch works? Is it just the reds and LM301s botg being on a CC driver, when turned off is still within the voltage range to where it runs the driver fine?

Sounds like that's exactly how it'd work to me. Flip the reds on and you'll lose a little bit of power to your white diodes.

 

[Airwalker16]

Sounds like that's exactly how it'd work to me. Flip the reds on and you'll lose a little bit of power to your white diodes.

They'd lose power if the voltages were the same using a CV driver. Whatever series parallel circuit needed to have them both be 54v. I was referring to a CC driver where the current stays constant but the driver would be a little bit less efficient with them off because that voltage is lost. This would be where the red circuit was wired to keep voltage as low as possible.
Sound right? @Chip Green

 

[christopher jordan]

Was just about to start a new thread and ask what light meters everyone recommends? I would like to get an Apogee eventually but its out of my budget at the moment until I pay off some credit cards at least. Was going to just get the Hydrofarm for now but seems like the Apogee gives a lot more consistent results. But in the meantime I need something better than an app to help dial in my light height. What's the best option in the < $100 price range?

I paid 115 for my hydro farm on Ebay. I just add about a 100 umols to the reading. I Figure thats about right.

 

[Rocket Soul]

Sounds like that's exactly how it'd work to me. Flip the reds on and you'll lose a little bit of power to your white diodes.

Either that or it increases the voltage a bit and increase load on the driver.

 

[Mikata]

I was over 1g per watt in both of my first two grows.

Is it a kingbrite or meijiu ?

 

[Mikata]

Id say they are but not diodes that gone thru QC as perfect top bin. They might sometimes be top flux bin but not lowest voltage bin which brings down per watt performance a bit. Or maybe a little bit outside tolerance limits for spectrum.
They do work fine though. But i wouldnt expect too much aftersales support. Id still rec hlg v1 boards though if they are still cheap.

Just under 2 but that was with Fotop boards: low watts (30ish per squarefoot) spread out very well over the cannopy, 8-10" hanging height minimizing wall losses. But that grow we must have had some luck, even the hps section finished 1g/w which we usually dont get. The secret is to push all envelopes: get spread right, spectrum right (i prefer 2700k 90cri for flower), plant health and we had shit loads of co2.

Tnx man

 

[fragileassassin]

Is it a kingbrite or meijiu ?

older meijiu with 561c diodes

 

[Hedek]

Hello all !
For a 80cmx80cm space (2.6'x2.6), do you think that a double quantum board is the best choice, or this :

https://app.alibaba.com/dynamiclink?touchId=62500123840&type=product&schema=enalibaba%3A%2F%2Fdetail%3Fid%3D62500123840%26ck%3Dshare_detail&ck=share_detail&shareScene=buyer

 

[sarahJane211]

Hello all !
For a 80cmx80cm space (2.6'x2.6), do you think that a double quantum board is the best choice, or this :

https://app.alibaba.com/dynamiclink?touchId=62500123840&type=product&schema=enalibaba%3A%2F%2Fdetail%3Fid%3D62500123840%26ck%3Dshare_detail&ck=share_detail&shareScene=buyer

Buy 1 of these for half the price!

https://www.alibaba.com/product-detail/Kingbrite-hlg-260-grow-light-240w_62080327296.html?spm=a2700.details.deiletai6.1.1446J6RgJ6Rg6d

 

[Mikata]

Is 1 KB qb288 powered with hlg 120 enough to veg 6 plants for 8 weeks ?

 

[sarahJane211]

Is 1 KB qb288 powered with hlg 120 enough to veg 6 plants for 8 weeks ?

Probably not, double that .......... HLG 240w + 2 Quantum boards .... 6 plants 2ft x 4ft grow space..

 

[Mikata]

Probably not, double that .......... HLG 240w + 2 Quantum boards .... 6 plants 2ft x 4ft grow space..

How many can i veg for 8 weeks under 1kb 288 with hlg 120?

 

[GBAUTO]

Vegging 8 sq ft with 120w is doable, but you'll have uniformity issues trying to do that with a single board.

 

[ilovereggae]

How many can i veg for 8 weeks under 1kb 288 with hlg 120?

8 week veg is pretty long. I wouldnt do more than 2 plants. Probably one well taken care of plant would use the whole 2x2 footprint.

 

[ilovereggae]

Vegging 8 sq ft with 120w is doable, but you'll have uniformity issues trying to do that with a single board.

2 boards and one 120W driver would be a much better layout. I still think with 8 week veg you would want to do 2 or maybe 3 max in a 2x4.

 

[Krypto Kid]

Depends on what strain you are growing, and type. Autos finish smaller and you can squeeze 3 or 4 into a 2x4 space. A full blown photo kush plant needs more than a 2x2 space. A single trained kush plant can fill a 2x4.
I used to do 3 plants in a 2x4 but you will get a higher yield with 2 plants. If you do 3 you crowd the center plant and it will grow skinny and square with little bushing outwards.

 

[tookah]

Would one single of these https://www.alibaba.com/product-detail/Pre-assemabled-KingBrite-quantum-led-board_62080222306.html be suitable for a 3x3x6 tent? Or would I need to get two? (LM301B 3500k)

 

[sarahJane211]

Would one single of these https://www.alibaba.com/product-detail/Pre-assemabled-KingBrite-quantum-led-board_62080222306.html be suitable for a 3x3x6 tent? Or would I need to get two? (LM301B 3500k)

That's a good price.
I have almost identical and it covers 2' x 4'

 

[Irish-roller-1]

To update what China boards can do. They good in my books

View attachment 4497370

Looks good. What boards you using and how much did they cost ??

 

[bigmikey86]

I went with the 301h’s w/ 660 crew’s. I think with everything shipped to my door was about $900 cdn? Consisted of three separate kits as well as some qb11 strips and an 80w Meanwell driver.