DiY LED - Cree CXA3070
- Thread starter SupraSPL
- Start date
Meinolf
Well-Known Member
I think those LEDIL reflectors are way too overpriced and add significant cost to any build. Come on, it's just plastic. From the pictures they also seem to be somehow transluscent which makes me wonder about the quality. I think you may be better off using any cheap similar shape and paint it white.
Positivity
Well-Known Member
$10 apiece is butt rapage
I'd boycott their arses until they get there prices in check. I i initially paid $5 each and I thought that was high.
You can get the same effect spreading out your cobs and getting them closer to the canopy...ala supra..
I've kinda promoted them, showing them off, but if you pay attention they go on and off, usually off....
They will make a strong light...HID style..but even more focused than most hps hoods. Like a high up gavita....
I'd boycott their arses until they get there prices in check. I i initially paid $5 each and I thought that was high.
You can get the same effect spreading out your cobs and getting them closer to the canopy...ala supra..
I've kinda promoted them, showing them off, but if you pay attention they go on and off, usually off....
They will make a strong light...HID style..but even more focused than most hps hoods. Like a high up gavita....
salmonetin
Well-Known Member
...ledil reflectors needs adaptation work for the wires of the thermocouple in the tc point...
...somebody test temps (reflector on board) on these way?.... sds do modifications but i dont remember if he go with reflector on board on her temp led tests...
saludos
...somebody test temps (reflector on board) on these way?.... sds do modifications but i dont remember if he go with reflector on board on her temp led tests...
saludos
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Positivity
Well-Known Member
I will check sometime soon hopefully salmone, next time light is free..
Its possible to test using modified ideal holder and reflector adapter. Could check reflector, reflector with diffuser lens, open....still haven't picked up a glass bubble type
Just curious...then I know when someone wants to sell me something..I know what they are selling....
.
marv2106
Well-Known Member
Thanks for the help ALESH !! And thank you too Captain, I went through more of your post and decided to go with your specs. I was over thinking this whole thing. So here it goes I will go with :
1x Cree CXB 3070 AB30G 55$ ( http://www.mouser.com/Search/ProductDetail.aspx?R=CXB3070-0000-000N0HAB30GvirtualkeyCXB3070-0000-000N0HAB30Gvirtualkey941-CXB30700N0HAB30G )
1x Mean Well LPC-60-1400 25$
1x Ideal Cob solderless holder 2$ (newak)
1x Rosewill RXC-Z1 - CPU Cooler 15 $ ( http://www.newegg.ca/Product/Product.aspx?Item=N82E16835200014 )
1x misc. 8$
total : 100$
I think this should do the trick, Im not 100% sure on the Rosewill cpu cooler though, if someone could confirm it will do the job for 1 cxb3070 i would appreciate it. Ill build one and go from there to probably build many more.
Thank you all once again, it is because of you that I and probably many others started seeing what real led grow lights are and how to build them.
robincnn
Well-Known Member
Is that rapid led a T Slot heatsink. They might not be ideal for COB's
https://www.rollitup.org/t/led-build-2-heatsink-200w.869479/#post-11556057
uzerneims
Well-Known Member
basically all cpu coolers will work
Positivity
Well-Known Member
yep...don't use a t-slot unless you need to. Doesn't seem to cool as well as a nice and flat one piece bottom. My theory is the heat doesn't spread from the source as well.
Any cpu cooler will work like uzer said. Just keep an eye out for a nice flat bottom, quiet fans, and good reviews. Pretty sure that rosewill was the one supra tested and liked. Cpu cooler shopping is actually kinda fun I think, cool little devices..
alesh
Well-Known Member
It's also quite beneficial to make sure that the pad on the CPU cooler is large enough for the COB and the holder (been there).
alesh
Well-Known Member
Yes it does. But there are many coolers that don't, so I'd careful with saying that any cooler can do the work.
HydroDC
Well-Known Member
Perhaps someone said that, but not me.
alesh
Well-Known Member
And I never said that you did lol
My original post was a reaction to such a post.
SupraSPL
Well-Known Member
Depending on your camera setup, you might like the 4000K 90 CRi $28 (Digikey does not seem to have 90CRi on hand but may be able to get them. They do have the 4000K 80 CRi and 5000K 90 CRi). Since you would not be running them for long hours, efficiency not a big factor so you can push them to the maximum current or beyond. With the Vero29 V2.0 on Arctic 64 Plus or Rosewill RCX-Z1, 12V-15V fan speed and good thermal paste, you could push it very hard for a few hours at a time and should get many years of service. I have not tried running a Vero29 that hard but I did run a Vero 10 at 2X max current for an hour or so and it did not seem to mind at all.
The Mean Well HLG-185H-42 will push a Vero29 to 4.5A (185W) and is dimmable, $64. ~15000 lumens of 90 CRi. I might have to try that too. Digikey does have the Vero18 2700K 97 CRi on hand.
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8valves4pistons2wheels
Member
Sorry i should have been more clear im making them to be grow capable but i will likely use them as spotlights over my torch at first so efficiency and longevity was kept in mind as well. slowly building my armada of hover lights so when my homie and i find a place out here we can pretty much jump right into it no assembly required. Also their are a few led non believers i might lend one out to for their veg room or somthing similar. Definatley appreciate you bringing some more info about more directions we could take these though i have stashed away your knowledge for future reference : )
generally the high CRI cobs aren't nearly as efficient as supplementing with 660 deep red monos. Somebody on rollitup a while back did some data interpretation comparing regular CRI and hi-CRI and found that high cri are significantly less efficient than a standard CRI led.
Producing light with leds and all the other phosphor based lights (t5s, cfls, induction) is also less efficient at longer wavelengths, and phosphor based leds (like cobs) is less efficient than monos.
Makes sense to use the most efficient source to supplement the primary source of light for missing wavelengths especially deep red (660nm),UVA UVB. Supplementing with a high CRI cob adds in a lot of wavelengths that don't need supplementing, 500 - 600 nm, since they are well covered with the other cobs.