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Finally got around to whacking a cheap frame together for the cxm22 3000k 80 cri i ordered. Through some voltage down the lines, and it all fired up nicely.

6 cxm22 on a mw hlg185h-48a arctic 64 cpu heatsinks and some cheapie ugly wall warts for fans.
 

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@CobKits would you recommend (2) CXM22 Gen 3 or Citi 1818 Gen 6 for a dual COB fixture? Target wattage for each COB is 75w from using a hlp-80h-54 at 1.5A.
 
@CobKits, when using my 6 cxm22 3000k 80cri in parrallel on a single hlg 185-48a, do i need to adjust the voltage screw, or just set it for maximum? I did read 54.5v off of it earlier with all of them hooked up and running.
 
sine143 said:
@CobKits, when using my 6 cxm22 3000k 80cri in parrallel on a single hlg 185-48a, do i need to adjust the voltage screw, or just set it for maximum? I did read 54.5v off of it earlier with all of them hooked up and running.
Click to expand...
with any sort of cooling 6 cobs can take the 4.2A fine, so

 
yeah I was planning on running the current flat out, but does voltage need any adjustment? or is it just overide to "max constant voltage" giving the forward voltage of the cob? (noob here)
 
as long as voltage is above what you need it will limit itself to what the cob array wants

if you have a wattsup wall meter you can turn voltage down until power draw starts to dip (output voltage will be around 50V), and then just back up enough to get back to your full power draw

that way say 5 of your cobs get disconnected, voltage will be limited to just over 50V and that last cob wont pull enough current to blow it
 
Just finished constructing framework and wiring it all up. Thanks @CobKits for your help and I look forward to my energy savings. The build was fun and I am more than happy with the overall product
(6) Luminus CXM 22 3500k 90CRI powered by an HLG-320H-48A in a 3x3 space. Bye bye HPS and I will be buying more of these soon for a second and third tent!
 

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I put together two pairs of lights, each has two Citi 048-1818's (identical pairs on each set). There was a difference between the amount of light put out by them that was obvious to my eye. I have no light meter, but it is also obvious in photos.

One pair is connected (in series) to an HLG-120H-C1400A, and should be running at about 70w each (as I understand it)

The other pair is connected (in parallel) to a HLG-120H-48A, and should be running at 78.5w each -- according to CobKit's website (they are on the SST-X heatsinks).

So, why are the ones connected to the HLG-120-C1400s obviously significantly brighter?
(I have other photos, no matter what angle I take it at, one set is much brighter than the other).

1818_comparison-2.JPG 1818_comparison-1.JPGScreen Shot 2017-04-16 at 9.59.00 AM.png
 
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Have you turned up the A version driver or did you just wire it up and go?
You may need to turn the VO up all the way. They may not be turned up enough.
Humanrob said:
The other pair is connected (in parallel) to a HLG-120H-48A, and should be running at 78.5w each -- according to CobKit's website (they are on the SST-X heatsinks).

So, why are the ones connected to the HLG-120-C1400s obviously significantly brighter?
(I have other photos, no matter what angle I take it at, one set is much brighter than the other).
Click to expand...
 
I must say, these DIY COBs are much more involved than I initially planned. Frame is finally done, and I'm about halfway done with wiring. Pictures to come when done hopefully by next weekend.

Also trying to keep this somewhat tidy, so my OCD is making this take much longer than it should.

6 CXM22 3000K
2 HLG-185-48B
 
What is the main difference between the Citizen 1812 3500k 80cri and Citizen 1818 3500k 80cri? Or would the 90cri version be a better choice to use.
 
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