CXM22s Won't Light

HazednConfused

HazednConfused

Well-Known Member
I have (4) CXM22 3500k 90 cri wired in series with 18 gauge 600v rated wire. Nothing is loose, I've made sure that the 2 mains are connected to the corresponding terminals on the first and last cobs, and all wiring in between goes from negative to positive and so on. I'm using a meanwell hlg 240h 54b driver. Any common reasons why these things won't light? Thanks for any help.
 

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HazednConfused

HazednConfused

Well-Known Member
nfhiggs said:
The voltage range on that driver is 27-54v. In order to power your cobs with it you will have to wire them in parallel not series.
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Damnit, What would the voltage range need to be to power them in series? Doesn't wiring them in parallel kill the cobs faster?
 
mefunky

mefunky

Well-Known Member
A lot of folks here run parallel setups including me. No problems . Just don't mix chips of different brands . You can also limit Voltage to the chips by adjusting the voltage on the driver. Good luck
 
HazednConfused

HazednConfused

Well-Known Member
mefunky said:
A lot of folks here run parallel setups including me. No problems . Just don't mix chips of different brands . You can also limit Voltage to the chips by adjusting the voltage on the driver. Good luck
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As long as I don't get this thermal runaway shit. My driver doesn't have any knobs, but will the 100k pot do the same thing? Thanks
 
mefunky

mefunky

Well-Known Member
Sorry it's early . I'm not sure about external dimming ,I have A drivers . With proper cooling I don't think you will have a problem with thermal run away unless something is wrong with the chip like bad strings of diodes , that would cause it to draw a different voltage. I'm sure someone will knowledge on B drivers will come through
 
HazednConfused

HazednConfused

Well-Known Member
Big thanks to you guys, I wired in parallel super fast by using the ideal holders. Worked like a charm! I was starting to get severely agitated with them not lighting. They may not be Cree, but these are by far the brightest lights I've ever seen in real life. Stoked about them. I appreciate the help guys.
 

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