Wiring COBs with different voltages in parallel

[SereneGreen]

I currently have 2 Luminus CXM-22 COBs (CXM-22-35-80-54-AC30-F4-3; 51.5v 1.1a typical) being driven by an HLG-120h-48a and it has been working fine in my 2x2 tent. However I would like add 2 more COB to balance out the light. I've got my eye on the Bridgelux 29SE (BXRC-35E10K0-B-7x-SE; 52v,1.8a typical). The typical voltages are very close however the currents are not.

Would there be any issue in running all 4 in parallel given the differences in voltage (minor) and current (major)?

Part 2 - At some point I might want to up my wattage on these 4 COBs. Assuming I can wire them in parallel, would the XLG-240-H work to power them? By my bad math, it looks like I could get 250watts out of it at max.

Thanks for looking.

 

[SereneGreen]

I'll simply my questions a little - any one know if you can use different voltage COBs in parallel?

 

[1212ham]

I glanced at the datasheets and I think they were both about 1 amp at 50v so I think it will probably be ok, at that voltage and power, but its not recommended. I'd keep them all the same.

 

[Rocket Soul]

I glanced at the datasheets and I think they were both about 1 amp at 50v so I think it will probably be ok, at that voltage and power, but its not recommended. I'd keep them all the same.

I agree, and op: If you're already thinking about upping total wattage why not get the 2 new cobs on a separate driver?
Also, why not go with CXMs?
I don't see any reason for doing what what youre doing.

 

[SereneGreen]

Thanks for the input!
No real reason... I'm a little pressed for space and one driver is smaller and simpler (and I won't be upper the wattage for a while). I like the SE's because they are easier to mount since they have actual mounting holes on them. And mostly because I want to try something different... I was curious and I couldn't find a reliable source about mixing voltages in parallel so I figured I'd ask.

 

[Rocket Soul]

Thanks for the input!
No real reason... I'm a little pressed for space and one driver is smaller and simpler (and I won't be upper the wattage for a while). I like the SE's because they are easier to mount since they have actual mounting holes on them. And mostly because I want to try something different... I was curious and I couldn't find a reliable source about mixing voltages in parallel so I figured I'd ask.

Ok.

If you want to run those 4 cobs together reliably you could do it with another driver: xlg150m by meanwell, put one cxm and one Vero in series, and do 2 parallel strings. If you later on decide you want to run more wattage then you can run 2 cxm in parallel on the original driver and 2 veros in series on the cxm.
Good luck.