Just FYI Jamco will be shipping 2/5/14
DiY LED - Cree CXA3070
- Thread starter SupraSPL
- Start date
Scotch089
Well-Known Member
Okay just wanted to ask before I start copying and pasting each part number, sounds like the xhp's are capable 134 lumens per watt, what is the highest bin available and in what Kelvin that would suit our needs? Right now I'm looking for cool whites for veg but am curious about the warms since gg pointed out they may be close to the 3070s eff
Hi, I am new in this forum. I am from Spain (sorry my bad english... I am trying improve it) , I have some experience with leds (red-white-blue) but I was seeing your results with only whites leds and i am impresive.
I have some technical questions:
- I have some heatsinks with : 80x10x1,5 cm. and weight : 1600 gr. Do you think is enought for cooling 80W without fan?
- I am searching the best quality and results (like always do) , after read some pages from this forum, i think Vero and CXA are the bests white leds. And about 3000K the best light. Wich model do you recomend me?
-I have a lot of drivers CC of this two models:
-30V and 2100mA (70W)
-30-36V and 3000mA (100W)
Could I use them to make me a good white lamp?? Maybe conect some leds in paralell?
Thanks for your help.
I have some technical questions:
- I have some heatsinks with : 80x10x1,5 cm. and weight : 1600 gr. Do you think is enought for cooling 80W without fan?
- I am searching the best quality and results (like always do) , after read some pages from this forum, i think Vero and CXA are the bests white leds. And about 3000K the best light. Wich model do you recomend me?
-I have a lot of drivers CC of this two models:
-30V and 2100mA (70W)
-30-36V and 3000mA (100W)
Could I use them to make me a good white lamp?? Maybe conect some leds in paralell?
Thanks for your help.
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Dloomis514
Well-Known Member
Not sure about the heat sinks working without a fan.
The 1800 Ma driver will work for a Cree 3070 or Vero.. The other driver is too much for a Cree but not for a Vero.
http://www.cree.com/~/media/Files/Cree/LED Components and Modules/XLamp/Data and Binning/ds CXA3070.pdf
http://www.bridgelux.com/wp-content/uploads/2013/10/DS33-Bridgelux-Vero-29-Datasheet.pdf
I use 3000 k units
Thanks son much, for your answer.
It is a mistake in the drivers, sorry. They are:
-30V and 2100mA
-30-36V and 3000mA
Could I put two CXA 3000K in the 80cm heatsink powered with 30-36V and 3100mA? Does each run on about 1500mA?
Wich type of leds are you using? CXA?
I was thinking in put maybe 2 or 3 COB in one 80cm. Is it posible with my drivers?
I am seeing the datasheet but still not clear...
Sorry for so much questions, and thanks again for yor answer
Dloomis514
Well-Known Member
36v is ok but the 3000a is too much for Cree, Vero will handle that tho
Thanks! and putting 3 Cree together? Making a pararell circuit? Running each module to 1A?
alesh
Well-Known Member
I don't think so. @3000mA you'd need well over 40V. Although 3000mA is more than maximum rating, I'm sure 3070 could handle it (not that I recommend that).
Perhaps your drivers don't have hard cap and decrease current with higher voltage - might be able to run CXA at a reasonable current. But unless you try it, no one can say for sure.
nestor
Well-Known Member
If he runs the 3000mA in parallel won't that split the amps while keeping the voltage the same? It might not run at the full 1.5mA if the voltage is a few volts too low, but wouldn't it still run them both roughly at 1.4 specs? Can someone with a bit more knowledge on the subject answer?
nogod_
Well-Known Member
Even at 1a, 36v is too low for a cxa3070. Probably too low for a v29 as well.
Possibly vero 18s?
Possibly vero 18s?
alesh
Well-Known Member
Yes, you're correct about voltage/current in parallel circuit.
However, actual behavior depends on driver. Some drivers are "hard capped" and won't run if their max voltage is lower than the voltage required to pull their rated current through. On the other hand, some drivers just decrease current if their max voltage is lower than required.
AbeFroman
Well-Known Member
This is a really cool thread. Some of the topics are out of my skillset though. I'm interested in building something similar to the light in the thread below for a 4x4 tent
https://www.rollitup.org/t/diy-led-grow-lights-with-cree-cxa3070-cobs-and-cpu-coolers.805681/
Is there anything you guys would change or add as far as hardware in that setup to meet my goals? I'm looking for something roughly equivalent in light to between 600-100w hps with the ability to veg.
Thanks
-Abe
https://www.rollitup.org/t/diy-led-grow-lights-with-cree-cxa3070-cobs-and-cpu-coolers.805681/
Is there anything you guys would change or add as far as hardware in that setup to meet my goals? I'm looking for something roughly equivalent in light to between 600-100w hps with the ability to veg.
Thanks
-Abe
nogod_
Well-Known Member
I think for larger setups the many cobs on a giant chunk of aluminum/high voltage driver makes more sense. Its actually simpler to setup (albeit slightly more dangerous with high voltage strings), and in general more efficient.
Whats your budget?
Whats your budget?
AbeFroman
Well-Known Member
Thanks for the quick response. Are you suggesting something similar to this in theory?
http://www.amazon.com/gp/product/B00KEXS9YC/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B00KEXS9YC&linkCode=as2&tag=ledgrowlightguide-20&linkId=7BABJW23QCN6ZPZ3
That's really what I was looking at but the price tag is what turned me off.
If possible I would like to keep my budget under $1k. I'm still learning as I go so I'm not sure if I'm being realistic.
Also I don't mind building two separate units. It doesn't need to be one huge one.
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nogod_
Well-Known Member
Kinda like that but not really. Here is an example of what Im talking about.
A popular heatsink for diy is the 5.886" width heatsink from heatsinkusa because it fits a 140mm computer case fan on top perfectly. Here is another example from one of RIUs more ostentatious members.
You could build 4x 30" light bars with 3 x 50w cobs on each and your build would look something like this:
12 x cobs [$500]
4 x drivers [$250]
4 x heatsinks [$200]
4 x fans [$60]
That would get you 600w of pretty damn good efficiency for $1000 not including all the little parts.
A popular heatsink for diy is the 5.886" width heatsink from heatsinkusa because it fits a 140mm computer case fan on top perfectly. Here is another example from one of RIUs more ostentatious members.
You could build 4x 30" light bars with 3 x 50w cobs on each and your build would look something like this:
12 x cobs [$500]
4 x drivers [$250]
4 x heatsinks [$200]
4 x fans [$60]
That would get you 600w of pretty damn good efficiency for $1000 not including all the little parts.
SupraSPL
Well-Known Member
Great advice. And to compare that DIY design against the Illumitex NeoSol DS:
The DS draws 515W, LED dissipation is about 440W, 30% efficient so that is 132 PAR W for $2400 ($18/PAR W)
The DIY draws 675W, LED dissipation is about 624W, 43.3% efficient so that is 270 PAR W for $1100 ($4/PAR W)
The DS draws 515W, LED dissipation is about 440W, 30% efficient so that is 132 PAR W for $2400 ($18/PAR W)
The DIY draws 675W, LED dissipation is about 624W, 43.3% efficient so that is 270 PAR W for $1100 ($4/PAR W)
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