I have a Question, why run them at 1400mA ?? those COB are meant to be run at 1.9 to 2.8 amp... you would have the same result with CXA2530 (36.4v*1.4A*8 = 407 watt ) but they cost 20 $, I'm curious, maybe they're something i don't understand in those datasheet............The way i see it, you should choose you power supply first (constant current), then adapt you COB to that supply and get the less expensive one that fit that current
is it a heating precaution ?
Depends on your design goals. @ 2.8a per cob you are going to be producing about twice as much heat as light.
@1.4a you are producing about the same heat/light.
Plenty of threads here for you to answer your own question.
Time to hit the books!
Hi was thinking of using 80mm cpu cooler for cob cxb3590 @50w hlg 120 1400c how did they work out for you and do you think they can get the job done
Easily build your own high-power LED Grow Light using COBs!
(Built with assistance of RIU contributors! - Original thread )
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Battlestar Ganjatica - A 480 Watt Multi-Mode LED Grow Light
6x CREE CXA3070 @ 3000K - $36ea ($216)
2x CREE CXA3070 @ 5000K - $38ea ($76)
8X Meanwell LPC-60-1400 Drivers - $20ea ($160)
8 Arctic Cool CPU Coolers - $9ea ($72)
Rhino 12v External HDD Power supply - $9 (for powering fans)
1 Tube Thermal Adhesive - $8
3'x1' White Shelving board - $10
4x Bottom Sliders for Drawers - $7ea ($2
(link is not exact model. I only paid $7 each in-store)
3x 2-way Switches - $4ea ($12)
4 heavy-duty stainless eye bolts - $1ea ($4) (in-store)
10 Pack In-sure easy wire connectors - $2
6-Pack Blue Mid-line connectors - $2
TOTAL PANEL BOM: $599
MISC Other Materials:
Ignore the fan-speed controller. Didn't end up using it.
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Wiring is pretty basic. Just scale up the below diagram (provided by RIU member Goud)
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And here you go!
3 Modes: Veg, Teen, Bloom
Preliminary Results look good!
First day over plants:
Week or so later:
I didn't try it yet but I'm sure it will work much better then a standard diy with cpu fans. CPU coolers work much much much better then your standard cpu fans by far.....even more reason to use a water cool setup or an all in one cpu cooler (such as the corsair h80i gt or/and corsair h100i gt).Hi was thinking of using 80mm cpu cooler for cob cxb3590 @50w hlg 120 1400c how did they work out for you and do you think they can get the job done
any input would be great
iceman3000
Those are good to but I rather do an all in one cpu cooler. It's maintenance free as well. I personally got a h100i and it's been running fine for roughly two years.ARCTIC Alpine 64 GT Rev. 2 CPU Cooler - AMD, Supports Multiple Sockets, 80mm PWM Fan at 22dBA
something like what was used in the build in this thread would cut the weight way down and price
Diminishing returns or ideal compromise?The CXA3070's are pretty much the most powerful/efficient COB's that the retail shopper can get their hands on. But the highest bins are often unavailable. I just bought a couple of 5000K CXA3070's. Had to settle for the CXA3070-0000-000N00Z450F because nobody's offering the higher bins. Not to the person who wants to buy 2 or 3 of them.
You have to be careful about lm/watt. They're more efficient when they're not being driven hard. You can get more light out of the device by driving it harder, but you're losing efficiency as you crank up the amperage. So it's a story of diminishing returns.
Good question.Diminishing returns or ideal compromise?
Easily build your own high-power LED Grow Light using COBs!
(Built with assistance of RIU contributors! - Original thread )
[HR][/HR]
Battlestar Ganjatica - A 480 Watt Multi-Mode LED Grow Light
6x CREE CXA3070 @ 3000K - $36ea ($216)
2x CREE CXA3070 @ 5000K - $38ea ($76)
8X Meanwell LPC-60-1400 Drivers - $20ea ($160)
8 Arctic Cool CPU Coolers - $9ea ($72)
Rhino 12v External HDD Power supply - $9 (for powering fans)
1 Tube Thermal Adhesive - $8
3'x1' White Shelving board - $10
4x Bottom Sliders for Drawers - $7ea ($2
(link is not exact model. I only paid $7 each in-store)
3x 2-way Switches - $4ea ($12)
4 heavy-duty stainless eye bolts - $1ea ($4) (in-store)
10 Pack In-sure easy wire connectors - $2
6-Pack Blue Mid-line connectors - $2
TOTAL PANEL BOM: $599
MISC Other Materials:
Ignore the fan-speed controller. Didn't end up using it.
[HR][/HR]
Wiring is pretty basic. Just scale up the below diagram (provided by RIU member Goud)
[HR][/HR]
And here you go!
3 Modes: Veg, Teen, Bloom
Preliminary Results look good!
First day over plants:
Week or so later:
That will work but I would suggest to connect all the fans to a fan controller. Also, put thermal pads to all the heat sinks and then to a temp gauge. You can set it to run faster in reference to the heat..etc.Would these CPU coolers http://www.ncix.com/detail/arctic-cooling-alpine-64-gt-68-79202-1716.htm work well to cool Vero29 cobs when Im driving each cob at 80W each?
Check out these two videos Fam.I love this. It seems relatively simple yet effective.
I do have a couple questions for you thought
1. For the wiring of the drivers. In the diagram it appears that you simple connect them all toget her by wiring all positives together and all negatives together. Correct? Then you simply connect that outcome of wires to your power supply cord? I'd love to see a complete diagram, just to ensure I do it correctly.
2. Connecting the cob lights to the fans. Was that done using the thermal adhesive? So they're basically taped or glued to the fan coolers ?
Thanks much,