Rocket Soul
Well-Known Member
Im at the same 10-12 as you, the boards are spaced 5 inches apart or more like 16 inches per FoTop. But the ability to go low is very nice, especially in our open space.
QB960 (960xlm301b) quantum board from China
- Thread starter EmeraldØsiris
- Start date
Rocket Soul
Well-Known Member
Wow, even less wattage than us. You must be killing the g/w.
SHABOOGY1
Well-Known Member
This will be my first grow with these lights on strains that I’ve ran multiple times. I can clearly see that 2g per watt is achievable with little effort.
Rocket Soul
Well-Known Member
As far as my growbuddys revised calculations we hit 2g/w on our first proper led grow. And thats the total, best trays are better, and the environment was not great. He still wont believe it.
rob333
Well-Known Member
wow thats safe lol
Moflow
Well-Known Member
Airwalker16
Well-Known Member
600w for the entire 4X8? Whoa..
ChiefRunningPhist
Well-Known Member
I tried this.. Good luck..
https://www.rollitup.org/t/next-on-stage-rita-fang-and-the-alibaba-qbs.983145/
You can't buy any boards with mixed SPD. If you do, and they require a sphere test over chip comparison (which I can understand) to determine flux bin then you'll be fucked. I had 660nm reds on my knock-off QB and in order to get the samsung flux measurement I'd have to pop off several Samsung diodes and reflow back onto a separate PCB to determine Samsung flux as the 660nm would mess up reading. And even if you do get all the same chip so you can test the entire board instead of doing surgery, it still might be a difficult task of finding a lab with a big enough sphere to fit that bad boy in it. I had trouble just getting labs to hit me back, it definitely takes longer to find a lab and set up a time to test chip flux than the time frame they allot you for trade assurance. Trade assurance did NOT honor me any refund, despite the promises and garuntees made by Rita. She claimed 10× my money back.
LM301b have 7 flux bins. SF SG SH SJ SK SL SM. If you actually are getting SK, they still are not top bin.
EDIT: oops didn't realize how old the post I quoted was...
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MeGaKiLlErMaN
Well-Known Member
You are right on the binning but the top that's for all color temperatures so it is the top for it's color range. If you want higher you need to go to 4000k-5000k which sucks for flower. I have a 4000k light and it makes veg amazing but flower with it is terrible.
ChiefRunningPhist
Well-Known Member
In 80CRI SL goes down to 3000k, SM starts at 4000k. Both are higher flux than SK.
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MeGaKiLlErMaN
Well-Known Member
But are they available is the question. When I contacted Samsung they said the 3000k SK was the highest bin they made and even finding fair priced lm302b SK chips that are color accurate is hard.
ChiefRunningPhist
Well-Known Member
That's the point I'm making. They claim top bin, while also saying SK. SK isn't top bin, and if they think that, how confident can you be that you are in fact getting SK? They don't know the technology, they are only spitting out what their sales managers told them to. There is a limited number of high quality, high fluxing chips. The higher flux are more valuable, that's why they seperate them into groups. It stands to reason that Samsung is supplying their daughter companies the best chips first, and then offering what's left to others. They won't sell better chips to a company that could hurt themselves or a direct subsidiary. So when people are being told they are the same chips, they are being lied to.
They will grow plants well, but getting back to reality, theres no such thing as a free lunch and the Chinese QBs aren't being populated with the best of the best. 1 or 2 bins under top is most likely what they are and those are still bright as shit so they work, but you're not actually getting the 220lm/w chips they are trying to claim.
I've been told by a light manufacturer that the best they've seen from a Chinese QB was almost 160lm/w but that was using philips 5050 chips. I tried to get mine tested but have given up as the surgery required to determine anything definitive now outweighs my current feeling of disgust over the issue.
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MeGaKiLlErMaN
Well-Known Member
That may be the case, however if you know where to go you can find a manufacturer that has them, buy enough and you can make it worth while. See my signature for details. I agree that there is some crap out there, hard to tell for sure without testing. I used the best SK I could find. They are the MacAdam 3Step ellipse bin as well to ensure color accuracy.
ChiefRunningPhist
Well-Known Member
Agree. There are places that sell the individual top bin chips, and even strips and QBs populated with true top bin (I think lol) but you won't find them on BABA for cheap. That's all I'm saying. And I'll check out your light!That may be the case, however if you know where to go you can find a manufacturer that has them, buy enough and you can make it worth while. See my signature for details. I agree that there is some crap out there, hard to tell for sure without testing. I used the best SK I could find. They are the MacAdam 3Step ellipse bin as well to ensure color accuracy.
Moflow
Well-Known Member
A quick search of 5000k for flowering doesn't give much results but there's a member on here who has actually used 5000k in flowering and he said it worked fine in practice despite the theoretical view of others who haven't tried it.
MeGaKiLlErMaN
Well-Known Member
It works, buds are dense, but they are also smaller than what I get from a standard HPS. If I Veg under the 4000k light then move to 2700k they explode in growth and size. I literally have a plant that needs a double scrog because it grew so large. It does help that I use 30 gal pots per plant. Just saying that it may work but there is a reason I getting better results from the HPS than the led and it's not par output, it's spectrum.
ChiefRunningPhist
Well-Known Member
Ya I was looking into heavy blue as well, was looking at MH growers and their results.
@MeGaKiLlErMaN you might glean some info to add to your light from this thread..
https://rollitup.org/t/mh-all-the-way.879401/
Good luck with your light!
MeGaKiLlErMaN
Well-Known Member
I appreciate it, I did try that a while back with a 90 cri MH and it doesn't scale to 1000W well from what I've seen. Flowers want more red in bloom but the higher cri does help a bit. My results weren't terrible just not as good as going from 4000k 70cri cobs to 2700k hps were from my experience.
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OLD MOTHER SATIVA
Well-Known Member
you may be right i may be wrong..but you are sure insinuating a" giant difference" between 4000k and 2700
i have used 3000 and 5000 for veg flower acouple times
and admit to not being anal but...
..i didn't see much difference at all..[please leave out the hps comparison..its just not helpig this led discussion]
i am guessing there was some other reason that one plant grew so large.......that sounds like an outlier
"Veg under the 4000k light then move to 2700k they explode in growth and size."
that is not a veg/flower test using 4 k and 2.7 k panels..its not relevent to a real test
a real test is one grow using 4k all through..one using 2.7k or whatever