The Chinese Quantum Board Knock Off Builds

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PrimeUK

Active Member
That's the 18 inch height ppfd map. I think that the uneven spread of the bars would certainly be better at averaging the ppfd so the edges are better illuminated and the centre not as much a hotspot
 
Airwalker16

Airwalker16

Well-Known Member
PrimeUK said:
Thanks guys, I didn't realise it was an app link
https://m.alibaba.com/product/62596082700/detail.html?activity_id=icbu_minisite_web&channel=minisite_a2706.wapshop.113.i11&from=icbu_minisite_web&isFromApp=1&scenery_id=2&language=en&currency=GBP&spm=a2706.wapshop.113.i11&_aplus_page_enable=true&wx_navbar_transparent=true
Hope this one works. There's vids on YouTube too, not many but a couple showing its design and par map.
I was ready to order their qb lights but when this was released I opted for it, I like the average ppfd concept. My grow is around 2m x 2m so I'm hoping that 2 of these would give coverage of most of it, leaving an edge, to use as an area to store bucket and place fans etc.
If they are as powerful as they suggest then I think it will be overkill, but rather have the extra power incase my set up changes in the future.
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Wow. First fixture I've seen that spaces the bars correctly for the best ppfd. Very very cool.
 
$licc Ricc

$licc Ricc

Active Member
I saw these exact ones as well. Was skeptical considering the price to those pictures claims. Does anyone know what kind of boards those are?
 
Rocket Soul

Rocket Soul

Well-Known Member
PrimeUK said:
Thanks guys, I didn't realise it was an app link
https://m.alibaba.com/product/62596082700/detail.html?activity_id=icbu_minisite_web&channel=minisite_a2706.wapshop.113.i11&from=icbu_minisite_web&isFromApp=1&scenery_id=2&language=en&currency=GBP&spm=a2706.wapshop.113.i11&_aplus_page_enable=true&wx_navbar_transparent=true
Hope this one works. There's vids on YouTube too, not many but a couple showing its design and par map.
I was ready to order their qb lights but when this was released I opted for it, I like the average ppfd concept. My grow is around 2m x 2m so I'm hoping that 2 of these would give coverage of most of it, leaving an edge, to use as an area to store bucket and place fans etc.
If they are as powerful as they suggest then I think it will be overkill, but rather have the extra power incase my set up changes in the future.
Click to expand...
The concept of a light with that even cover is very interesting and the design looks promising with spacing tweeked but id prefer to see those numbers measured before believing in them, not cause they are too high, but they are too even. Spacing of bars can help you even out over one dimension (side to side or front too back) but not the other one, unless you have some asymmetric power levels or diode densities. Even with a reflective tent (which isnt iiindicated in the par maps but lets assume) i find it hard to believe in a corner reading with only 3% less than the middle. That is very hard to achieve, trust me ive tried and it is litterally impossible with a linear build with homogeneous diode density and equal powerlevels all thru the strip. I call at least partial bullshit on those numbers evenness. And geeklight is not really a company ive seen properly tested by anyone. Then again, the light might fine and have better evenness than anyone elses light, but when they are fairly clearly fudging on one thing then where does the fudging stop?

Please see if you can confirm those numbers, or atleast the evenness?
 
DrKiz

DrKiz

Well-Known Member
Rocket Soul said:
The concept of a light with that even cover is very interesting and the design looks promising with spacing tweeked but id prefer to see those numbers measured before believing in them, not cause they are too high, but they are too even. Spacing of bars can help you even out over one dimension (side to side or front too back) but not the other one, unless you have some asymmetric power levels or diode densities. Even with a reflective tent (which isnt iiindicated in the par maps but lets assume) i find it hard to believe in a corner reading with only 3% less than the middle. That is very hard to achieve, trust me ive tried and it is litterally impossible with a linear build with homogeneous diode density and equal powerlevels all thru the strip. I call at least partial bullshit on those numbers evenness. And geeklight is not really a company ive seen properly tested by anyone. Then again, the light might fine and have better evenness than anyone elses light, but when they are fairly clearly fudging on one thing then where does the fudging stop?

Please see if you can confirm those numbers, or atleast the evenness?
Click to expand...
I agree, the corner reading's are suspect... meaning the rest are questionable as well.
 
DrKiz

DrKiz

Well-Known Member
J-Jaidee said:
Can I ask for the link where you ordered this?
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I have the same one's coming in. They look excellent!

I also run two Majo 800's 10 bars from Meijiu.

The bars cover the canopy great. You can get them closer than the panel LED's, better penetration, and your corners and edges don't produce niiiice bud.
 
DrKiz

DrKiz

Well-Known Member
J-Jaidee said:
Hey everyone, I got quoted a price of $760 including shipping but with an additional 2.95% credit card fee for the light below. In your opinion is it worth it? This is the style of light I like and don’t want to do much DIY-ing.

Meijiu 600W ETL Samsung lm301h led grow light bar with osram led chips, 180 degree Foldable grow light far red for indoor plants
https://m.alibaba.com/product/62511893263/Meijiu-600W-ETL-Samsung-lm301h-led.html?__sceneInfo={"type":"appDetailShare","data":{"filterKey":"7.8.2_share","cacheTime":"1800000"}}View attachment 4572123
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Wrong one homie. You want the MJ-650 8 bar.

Get the lm301b.. cheaper.
 
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PrimeUK

Active Member
Rocket Soul said:
The concept of a light with that even cover is very interesting and the design looks promising with spacing tweeked but id prefer to see those numbers measured before believing in them, not cause they are too high, but they are too even. Spacing of bars can help you even out over one dimension (side to side or front too back) but not the other one, unless you have some asymmetric power levels or diode densities. Even with a reflective tent (which isnt iiindicated in the par maps but lets assume) i find it hard to believe in a corner reading with only 3% less than the middle. That is very hard to achieve, trust me ive tried and it is litterally impossible with a linear build with homogeneous diode density and equal powerlevels all thru the strip. I call at least partial bullshit on those numbers evenness. And geeklight is not really a company ive seen properly tested by anyone. Then again, the light might fine and have better evenness than anyone elses light, but when they are fairly clearly fudging on one thing then where does the fudging stop?

Please see if you can confirm those numbers, or atleast the evenness?
Click to expand...
I'll certainly try mate, would a cheap light meter be good for that? I can get one of those for a tenner and I assume it would show difference in the relative brightness across the fixture I hope
 
P

PrimeUK

Active Member
I've no doubt that the readings are questionable. With led technology as it is though now, I'm sure that it will be a replacement for one 600 watt hps at the very least.
I have looked
DrKiz said:
Wrong one homie. You want the MJ-650 8 bar.

Get the lm301b.. cheaper.
Click to expand...
The fixture wouldn't fit through the access hatch, it is real small, so needs to be assembled in the room itself. Even a hg550 style panel wouldn't fit as the hatch is that small
Is that light the meijiu one?
 
Rocket Soul

Rocket Soul

Well-Known Member
PrimeUK said:
I'll certainly try mate, would a cheap light meter be good for that? I can get one of those for a tenner and I assume it would show difference in the relative brightness across the fixture I hope
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Yes, for getting your an idea of even spread a lux meter is ok. Its a good thing to have but dont go and buy all account on me, but i do like that youre prepared to put knowledge back into this thread/community.
 
emepher

emepher

Well-Known Member
Just another Kingbrite/Alibaba experience to throw on the pile:

They took 2-3 days to get my order out, and I had it in my hands about a week later. After some of the horror stories I've heard about getting stuff shipped from China lately, I was very pleasantly surprised, and impressed. Packaging was good. No weird shipping labels with a bunch of Chinese on them, unlike some other things I've ordered direct, and the only indicator of the contents was a very small mention of a "lighting kit."

Build quality seems solid enough. I just got one lower-end 240W light to try out but I have a feeling I'll be going back to Kingbrite next time. No hours on the light yet but I see no problems with it.
 
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Baked420☆

Active Member
Gond00s said:
Jesus when will people understand 301b and 301h are the fucking same.
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They’re not the same they’re just the same footprint same everything but the H version has a different phosphorus coding which produces a different spectrum more tailored toward the red and the 2700 and 3000 K Calvin just like 4000 5000 Calvin the phosphorus coding on those helps balance everything out to reduce the blue spike and higher Calvin LEDs to prevent plant Stunt and smaller compact from too much blue an increase is more red and the higher Calvin to equal it out I am just the opposite with the lower Calvin it hasSo Ezy basically affecting the blue to red ratio to help promote better growth from plants
 
bk78

bk78

Well-Known Member
Baked420☆ said:
They’re not the same they’re just the same footprint same everything but the H version has a different phosphorus coding which produces a different spectrum more tailored toward the red and the 2700 and 3000 K Calvin just like 4000 5000 Calvin the phosphorus coding on those helps balance everything out to reduce the blue spike and higher Calvin LEDs to prevent plant Stunt and smaller compact from too much blue an increase is more red and the higher Calvin to equal it out I am just the opposite with the lower Calvin it hasSo Ezy basically affecting the blue to red ratio to help promote better growth from plants
Click to expand...
Wrong
 
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