Gonna do my first DIY LED with Cree CXA3590

Dloomis514

Dloomis514

Well-Known Member
REALSTYLES said:
Well I got the wrong COB issue fixed and added 2 extra so I can have an even heat distribution. With all 8 going it's running 378 watts on the CXA3590 3000k at 3.71 amps.

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I need too work on my spacial recognition tendencies. The column for those COBs don't look even. The ones on the ends have way less aluminum dedicated to them for cooling. Just saying.
 
nvhak49

nvhak49

Well-Known Member
Awesome light dude, mad props. I really want to make one I'm new to LEDs I have one vipar 600w right now but I want a good Efficient led and what you made looks super sweet stoked to see how it works for you. How much it cost to build the bloom light? How big of a tent you growing in?
 
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GetThatPoison

Member
SupraSPL said:
At 700mA (51W), a 12-20" spread between COBs is doable, depending on the canopy size you need to cover. If you are planning on using active cooling, for (4) CXA3590s (204W)
-3.5" profile - 46" length
-4.23" profile, 36" length
-4.6" serrated, 17.5" length
-4.9" profile, 25.5" length
-5.375" profile, 17.5" length
-5.88" profile, 23" length
-7.28" profile, 17.5" length
-8.46" profile, 15" length


But if you are thinking passive cooling, with a little help from your circulation fan, basically triple the lengths above. I am still experimenting with reducing the passive cooling numbers though, you might be able to get away with a lot less if your circulation fan is hitting them.
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Im trying to build using diy lights for the first time. Can anyone steer me in the right direction? Ive read so many threads it just gets confusing after a while

I have 5 x CXA3590 @5000k CB's, 2nd bin (11,000 to 12,210) being delivered this week. I have a temporary area im using for a few months that is 1.5 feet by 5 feet wide. while I learn. I was thinking about a narrow heatsink with the COB's spread out. maybe 5.88" profile x 24" length? Probably HLG-185H-C700B but that would only power 4 if I dimmed a little. Maybe use the 5th COB for seedling container on a cpu heatsink or is that too powerful and use cfl's?

Does anyone have a suggestion on how I can get the most growth vs being more cost efficient running them, say if electricty was free? Should i get two 1050ma vs 1 x 700ma dimmed? would 1050ma or 1400ma produce enough of a difference in growth or should I build multi 700ma 4 or 8 cob lights like @REALSTYLES

Any help would be really appreciated. Thanks
 
SupraSPL

SupraSPL

Well-Known Member
If you run 4 CXA3590s @ 700mA in 7.5 ft² area that would be 27W/ft². For reference I use less than 10W/ft² in the vegging area and about 30W/ft² in the flowering area. So if you are building a vegging light they will veg up very fast and the intensity might reduce stretch quite a bit, which could be undesirable if you are growing indica doms.

Although electricity cost is a significant issue, especially for those living in high cost areas where electricoty can be 20-45 cents/kWh, heat is an even more important issue in many grows. That said, I think CXA3590 77V class @ 700mA is a fine compromise of cost and efficiency. If you wanted to be able to run all 5 on one driver you could use HLG-185H-C500 or you could run one of the CXAs on a separate driver with something like this (280mA)
 
Romz1

Romz1

Member
Hey REALSTYLES nice project you got! Congrats!
I just wanted to hear, was there any problems with delivery from KingBrite? and did you recieve some of their holders/reflectors?
 
REALSTYLES

REALSTYLES

Well-Known Member
Romz1 said:
Hey REALSTYLES nice project you got! Congrats!
I just wanted to hear, was there any problems with delivery from KingBrite? and did you recieve some of their holders/reflectors?
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No I just bought the 3590's and it took 12 working days

Sent from my SM-G900P using Rollitup mobile app
 
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