Diy cree cxb3590 3500k help please

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Elijah Ferman

Member
I'm going to be buying some diy cree cxb3590s they are 150w come with big heat sink so no fan needed meanwell driver and 90 degree lens i am buying 10 of them off alibaba for like 880 (10 is the min you can buy) so I'll be able to make a 1500w light butI'm only going to do a 5x5 scrog how many should i use and how far should i spread them out from each other? I seen optic led sells a 50w cree cxb3590 for 200 which i think is ridiculous lol but it says get a 2x2 footprint so how
Many for a 5x5? Thanks in advance for taking time to read
 
coreywebster

coreywebster

Well-Known Member
I would do a bit more research before buying. That doesn't add up right.
I think the cxb3590 @36v has a max current of 3.6 amp which would make less than 150w.
the 72v versions have a max current of 1.8 amp to achieve the same power.
You don't run them at full current, the idea is to run them at lower current to get higher efficiency.
But either way I don't think even at full they can get 150w per chip but if you could the heatsink would have to be huge too.

There are some good sources on Alibaba especially for COBs but there are some shady ones too.

I will get @CobKits involved at this point because he knows his chips and his prices are good if your in the USA.
Besides that there are better options than cxb3590s these days.
Cobby, what say you on the matter?
 
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Elijah Ferman

Member
coreywebster said:
I would do a bit more research before buying. That doesn't add up right.
I think the cxb3590 @36v has a max current of 3.6 amp which would make less than 150w.
the 72v versions have a max current of 1.8 amp to achieve the same power.
You don't run them at full current, the idea is to run them at lower current to get higher efficiency.
But either way I don't think even at full they can get 150w per chip but if you could the heatsink would have to be huge too.

There are some good sources on Alibaba especially for COBs but there are some shady ones too.

I will get @CobKits involved at this point because he knows his chips and his prices are good if your in the USA.
Besides that there are better options than cxb3590s these days.
Cobby, what say you on the matter?
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Hey thanks for the response i tried posting a link it wouldn't let me tho it does day the actual wattage is only 134 What lights out there are better tho? I just read allot of good things about those cree and building one seems allot cheaper than buying one. But then i see the solo 600 on Alibaba which seems really nice for under 600 and topshelflight sells them for over 1000 it's to hard to choose a light lol i don't mind spending money on one i jus want to make sure it's gonna do what it says is gonna do
 
D

Dave455

Well-Known Member
Elijah Ferman said:
I'm going to be buying some diy cree cxb3590s they are 150w come with big heat sink so no fan needed meanwell driver and 90 degree lens i am buying 10 of them off alibaba for like 880 (10 is the min you can buy) so I'll be able to make a 1500w light butI'm only going to do a 5x5 scrog how many should i use and how far should i spread them out from each other? I seen optic led sells a 50w cree cxb3590 for 200 which i think is ridiculous lol but it says get a 2x2 footprint so how
Many for a 5x5? Thanks in advance for taking time to read
Click to expand...
Get Cobkits involved. Luminus cxm22 far cheaper and more efficient.
 
coreywebster

coreywebster

Well-Known Member
Elijah Ferman said:
Hey thanks for the response i tried posting a link it wouldn't let me tho it does day the actual wattage is only 134 What lights out there are better tho? I just read allot of good things about those cree and building one seems allot cheaper than buying one. But then i see the solo 600 on Alibaba which seems really nice for under 600 and topshelflight sells them for over 1000 it's to hard to choose a light lol i don't mind spending money on one i jus want to make sure it's gonna do what it says is gonna do
Click to expand...
The cree 3590s were all the rage at one point and for good reason, but there are other options to get similar results such as citizen 1212s, 1812, ect which are cheaper. Also vero 29s I think are the better value and same sort of efficiency at higher wattages. That would be a more cost effective solution.

I'm sure with your budget you can build something to really rock that 5x5 area.
There are also other options such as a HLG 600 from horticultural lighting group, but I didn't want to complicate things further for you earlier.

But I would have a look at cobkits.com and look at the vero 29s to give you an idea. I'm sure @CobKits will chime in and give you an a better idea of what would suit you when hes available..

My knowledge pails in comparison and I don't want to misinform you so will leave it to him to give far better advice than I could.
 
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VegasWinner

Well-Known Member
I have some 150w cree cxb3590 cobs. The cxb3590 is rated at Vf =72v and use a HLG-185H-C2100B driver. Works great! makes plenty of light.
 
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Elijah Ferman

Member
coreywebster said:
The cree 3590s were all the rage at one point and for good reason, but there are other options to get similar results such as citizen 1212s, 1812, ect which are cheaper. Also vero 29s I think are the better value and same sort of efficiency at higher wattages. That would be a more cost effective solution.

I'm sure with your budget you can build something to really rock that 5x5 area.
There are also other options such as a HLG 600 from horticultural lighting group, but I didn't want to complicate things further for you earlier.

But I would have a look at cobkits.com and look at the vero 29s to give you an idea. I'm sure @CobKits will chime in and give you an a better idea of what would suit you when hes available..

My knowledge pails in comparison and I don't want to misinform you so will leave it to him to give far better advice than I could.
Click to expand...
Thanks i will deff be checking into it and the company with the lights i was talking about is king shine industries you can Google there site
 
CobKits

CobKits

Well-Known Member
VegasWinner said:
I have some 150w cree cxb3590 cobs. The cxb3590 is rated at Vf =72v and use a HLG-185H-C2100B driver. Works great! makes plenty of light.
Click to expand...
it should make some light considering you are running it 15% over its maximum current. efficiency probably stinks though
 
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VegasWinner

Well-Known Member
CobKits said:
it should make some light considering you are running it 15% over its maximum current. efficiency probably stinks though
Click to expand...
You should learn to stay out of grown folks business. You are now showing your real ignorance called bias. That setup you just thumbed your dumbass nose at came recommended by SUPRA himself. We talked about different cobs and he recommended the setup which still works great. If you are a professional engineer with a license you should get a refund you were short changed or else your bias towards me surpasses common sense but a sense of entitlement to respond whether you know or not. Three things are soon revealed, the sun, the moon, and the truth. The truth is your issue your bias will cost you money. Karma.
 
CobKits

CobKits

Well-Known Member
VegasWinner said:
You should learn to stay out of grown folks business. You are now showing your real ignorance called bias.
Click to expand...
oh lol@you, always playing the "personal attack victim" when your lack of understanding is exposed. Its not ignorance or bias, just facts. I know Supra can read a datasheet, can you? Do you really not know that the max current on the chip is 1800 mA? > here you go, sounds like you havent seen this. take a look at the repercussions to flux in the conditions in which you are operating your chips

http://www.cree.com/led-components/media/documents/ds-CXB3590.pdf

VegasWinner said:
That setup you just thumbed your dumbass nose at came recommended by SUPRA himself. We talked about different cobs and he recommended the setup which still works great.
Click to expand...
im sure it does. doesnt mean its not operating well out of manufacturers spec at low efficiency. Supra is a very knowledgeable person, not some magical deity who blessed your light.

while there is nothing "wrong" with it, you are one of the very very few people in this community and run cobs in excess of max manufacturers current but hey its your electric bill, dont let me stop you.

if opening and reading the datasheet is too difficult this might be more up your alley. im going to save this to show people who run T5s where their <100 lm/W lights operate at, relatively

upload_2018-1-23_20-51-32.png

p.s. there is no better way to demonstrate lack of an argument like ad hominems so keep em coming....
 
coreywebster

coreywebster

Well-Known Member
CobKits said:
it should make some light considering you are running it 15% over its maximum current. efficiency probably stinks though
Click to expand...
If you had $800+ to light a 5x5 would you go for? Veros? How many and which drivers and heat sinks.
I assume is perfectly possible to do on that budget, I'm not in touch with which the most cost effective these days. I stopped paying much attention once I built my citi set up.
What would be a good set up with a good balance between efficiency and build cost? You know your chips, I only know citizens.

Cheers
 
wietefras

wietefras

Well-Known Member
VegasWinner said:
I have some 150w cree cxb3590 cobs. The cxb3590 is rated at Vf =72v and use a HLG-185H-C2100B driver.
Click to expand...
Are you doing that to make COBs look bad on purpose? You'd end up on something pitiful like 1.5umol/J if you over run them that hard.

Besides, you yelled and cursed at me for even suggesting that people should run a CXB3590 on 61.5W instead of 48W. Why do that when you yourself now claim to "cremate" them on 150W?
 
Randomblame

Randomblame

Well-Known Member
VegasWinner said:
You should learn to stay out of grown folks business. You are now showing your real ignorance called bias. That setup you just thumbed your dumbass nose at came recommended by SUPRA himself. We talked about different cobs and he recommended the setup which still works great. If you are a professional engineer with a license you should get a refund you were short changed or else your bias towards me surpasses common sense but a sense of entitlement to respond whether you know or not. Three things are soon revealed, the sun, the moon, and the truth. The truth is your issue your bias will cost you money. Karma.
Click to expand...
To recommend a new user to drive a CXB3590 with 150w is not only wrong but also unfair. Running COBs above the maximum shortens their lifetime and makes them inefficient. You testify to have a buddhist attitude, but now you show how hostile you really are. You could have recommended keeping all the COB's and running them at half current ... but no, you recommend the bad thing and shovel bad things to your own karma.
Namaste!

BTW, I had a Vero29gen6, which I could run without problems with 5,2A. But just because it's not burned out, I recommend that to no one else.

@Elijah Ferman
If you have already bought everything, use the built-in dimmers or operate the COB's in a parallel circuit to lower the current. CXB3590 perform best when running at 36-75w (50-55% effiency), at 150w we talk about 35% effiency, not better than HPS.
Do youself a favor and and listen to what cobkits has recommended.
 
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