Fanleaf's Huge 42 COB Array Build Plus Other Builds

By the way. In my grams per watt grow in my signature it sure looks like I may hit close to 2 grams per watt. I never really did a grams per watt grow so decided to run the room at 510W from start to finish. While some bad shit happened in the family I didn't keep up with the journal very well and for that matter I didn't really put 100% into the plants it will be a very high yield for 510 watts in a 4X4.5 room. 3000k/5000k mix or all 3500k is the shit. Usually I run that shit at about 900W or even more but wanted to see what it could do with 25 chips in there only 10-11" from the canopy at 510W.

They still have a few weeks left and so far it's lookin damn good.

The key here is 1+ chip per square foot so you get even canopy coverage. That's the only way you can drop them that close to the canopy and still get even coverage.

You want to save on power? It's all in using more chips at lower power.

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fanleaf said:
By the way. In my grams per watt grow in my signature it sure looks like I may hit close to 2 grams per watt. I never really did a grams per watt grow so decided to run the room at 510W from start to finish. While some bad shit happened in the family I didn't keep up with the journal very well and for that matter I didn't really put 100% into the plants it will be a very high yield for 510 watts in a 4X4.5 room. 3000k/5000k mix or all 3500k is the shit. Usually I run that shit at about 900W or even more but wanted to see what it could do with 25 chips in there only 10-11" from the canopy at 510W.

They still have a few weeks left and so far it's lookin damn good.

The key here is 1+ chip per square foot so you get even canopy coverage. That's the only way you can drop them that close to the canopy and still get even coverage.

You want to save on power? It's all in using more chips at lower power.

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Easy 1.9. Prob 2.1 if you cure it with some humidity.
 
Is there anyone from South Africa here that has built such a light? If so I would like to get in contact with them to see what we have locally available. Thanks
 
Thanks Jimmy, would be ideal to get hold of someone in SA that can guide one through the process. Found 2 sites that advertise them but there is so many different varieties and codes it gets a little confusing especially when it comes to different opinions also in terms of which cob works best cxa, cba etc etc lol
 
One of those are Mouser so if someone could be a bit more specific in terms of manufacturer codes for what is required then it would help quite a bit. We have some of the best strains here in Africa but for indoor growing it's tough as a starter to find the correct information. Yes I could order the goods online but that can take at least 4-10 weeks and at a premium
 
JustinHemp420 said:
One of those are Mouser so if someone could be a bit more specific in terms of manufacturer codes for what is required then it would help quite a bit. We have some of the best strains here in Africa but for indoor growing it's tough as a starter to find the correct information. Yes I could order the goods online but that can take at least 4-10 weeks and at a premium
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How big is your Grow area and what is your budget? These are the first two factors you have to look at.
 
1 square meter/10 square feet so it's not huge and budget I presume you mean for the lights. Well let's say I would like something good but not necessarily the best, I would ideally like one setup to cover both veg and flower.
 
JimmyJames905 said:
It depends on wether you use Vero or Cree. Vero leans more to the red. So 4000 k is equal to a Cree 3500k. The major difference being that Vero 4000k blues peak at 430nm at 4000 k while the 4000k Cree peaks at 450nm but it's reds are that of a 3500k. Most Vero users just go with the 4000 k as an "all purpose chip". Personally I like mixing the 4000 with the 1750 as the 1750 gives you those reds you don't get from any other chip maker. To date I haven't seen anything on the cob market that gives you reds in the 650-750nm reds. Vero consistently puts out more reds. Imho Cree is slightly more powerful while Vero is considerably cheaper (half price) if price isn't an obstacle go with the Cree.
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Thanks Jimmy!! You really know ur
sh it! How long have ya been building cob lites? If price wasnt an issue for you/customers would you still be using veros?

Correct me is Im wrong here, but with crees u get the 3500k as a good all around light & add 5000k for blues but with vero you get 4000k as an all around @ 1750k to add deeper reds?? .
 
jr21 said:
Thanks Jimmy!! You really know ur
sh it! How long have ya been building cob lites? If price wasnt an issue for you/customers would you still be using veros?

Correct me is Im wrong here, but with crees u get the 3500k as a good all around light & add 5000k for blues but with vero you get 4000k as an all around @ 1750k to add deeper reds?? .
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Sort of. Cree doesn't make a cob chip that does 660nm reds. They make a SMD in the xpe line but they're very small.

I would probably still stick with Bridgelux if price wasn't an option. They've been pretty good to me and as you can tell from my videos they have a lot of features that the other SMD based Cobbs just don't have. Vero are not cheaper because they're not as good they are cheaper because they are built on a brand-new technology that is much less expensive to create Cobs with. Because Cree and citizen use SMD technology (10+ year old tech) all those tiny little SMD's have to be sorted by hand and individually tested. This is called "binning" Bridgelux does it a completely different way. There are no SMD's. Everything is extruded on to the substrate of the chip and then it's made in a "gas vaporization chamber" that uses sapphire in a gas form to build the semiconductor.
 
JimmyJames905 said:
Sort of. Cree doesn't make a cob chip that does 660nm reds. They make a SMD in the xpe line but they're very small.

I would probably still stick with Bridgelux if price wasn't an option. They've been pretty good to me and as you can tell from my videos they have a lot of features that the other SMD based Cobbs just don't have. Vero are not cheaper because they're not as good they are cheaper because they are built on a brand-new technology that is much less expensive to create Cobs with. Because Cree and citizen use SMD technology (10+ year old tech) all those tiny little SMD's have to be sorted by hand and individually tested. This is called "binning" Bridgelux does it a completely different way. There are no SMD's. Everything is extruded on to the substrate of the chip and then it's made in a "gas vaporization chamber" that uses sapphire in a gas form to build the semiconductor.
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What? Crees 3000k 80CRI does more of the 660nm spectrum than Vero does. And the 3000k 90CRI peaks at 660nm. Ive got more on this subject later as well
 
JimmyJames905 said:
Cree CXB 3000k 90cri peaks at 630nm
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Vero 29 1750k peaks at 650nm
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From 620-640. Also even though the 1750 chip peaks with more red you also have to take into account the MUCH MUCH higher photon count of the 3000k 90CRI vs the 1750. Looks to me that the 90CRI will still put out more light photons at 650-660 just because the light output is so much higher. The 3000k 90CRI is at 90% at 650nm.
 
keddeas said:
I wondered, if these would be better than the normal heatsinks, for the Vero29?? looking for the best thermal dissipation for the COB's. 100W COB LED Lighting Heat Pipes Module - COB LED Heat Sink - DC Fan,AC Fan and Blower,Cooling Fans,LED Heatsinks_Cooltron Industrial
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Those are pricey and require fans. Your best bet is still the SST 120mm ($18.50) from Cobkits or NGL if running a Vero D series at 1400-1750mA or the SST150 or SST-X if running the Vero C series at 1400mA.
Another good and cheaper option is the IceLed sink from Cutter. Comes with the fan.
Great price.
 
Fanleaf's Huge 42 Cree CXB3590 COB Array Build Plus Other Builds

fanleaf said:
From 620-640. Also even though the 1750 chip peaks with more red you also have to take into account the MUCH MUCH higher photon count of the 3000k 90CRI vs the 1750. Looks to me that the 90CRI will still put out more light photons at 650-660 just because the light output is so much higher. The 3000k 90CRI is at 90% at 650nm.
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Yes but most of those photons in the 3000k Cree are probably accounted for in the blue spectrum. The Cree hands down produces more lumens but does it produce more photons in the 660 range? Impossible to tell.
The Vero 17 has very little blue light. (30% power in blues compared to Crees 70% power in blues) When you plug one in you will see that it is extremely red light. Much more red than HPS.
There has to be something to the Vero 1750k or I do not think Growmau5 would market it in his "Cutter Growmau5 kits" as "Cutting Edge" technology specifically for flowering.
If it's good enough for Growmau5...it's good enough for me.
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There is a well known member on riu that did tests on the cxb3590's and found that there kelvin rating is actually higher than what is stated.. There is a huge thread on it.. He tests multiple chips and the consensus was that a cree cxb3590 3000k/80 tested out to 3400k almost every time.. Yes there were variances between chips but that was the average over a lot of chips.. And he tested 4000&5000's as well.. All seem to be higher in the blues.. His results led him to believe that this was how cree was getting higher lumen per watt ratios.. Please dont shoot the messanger... Now im not saying cree dosent make good products, i have cree light bars all over my truck.. But its a very interesting read, i think its over a 1000 pages.. There are some cob and qb guru's on that site that make my head spin.... And im an electrician by trade...
Cheers
 
Lets not forget Jimmy that I'm the one who found and sent you a link to the 1750k vero. After that we went over it together and found it interesting.
The whole thing is photons guys. The purpose of most cob builds is to save power to end up with the same result. If you think you can do that by using chips that provide less photons per watt than hps you have some learning to do.

Will the 1750k chip grow plants? Hell yes it will. Will it do it efficiently? Hell no it wont. A plant uses photons to grow and when a light source puts out half the photons at the same power as another source that makes it inefficient.
Cannabis is proven to adapt to whatever spectrum is provided to it to grow within reason. Thats why some growers go start to finish under a 6500k and some with great results.
It always goes back to this.....we spend a bunch more money going cob for a reason. If not for efficiency then why not just go hps or blurple LED's?
A chip producing 180+ lumens per watt inside the par spectrum with a decent spectrum will outgrow a chip that produces 90 lumens per watt every time.
 
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