WHICH COB HOLDER?

I am trying to build a few cob fixtures. Each fixture will have 8 citizen clu048 1212 cobs. 6500k for veg and 3000k for flower. Here is my issue. I will be using a mean well hlg 320h c1050b driver to run these 8 cobs. it will be 2 8 cob fixtures per 4x4. So a little under 37 watts per sqft. My issue is that the ideal holder specs state that it is 250 volts max. Will the driver be too much for the max rating of the holder if it is wired in a series? Am I missing something here? If so, can someone recommend a compatible holder for my setup? I actually wanted to go with the BJB holders but their rating was even less. Any help would be greatly appreciated.

I also forgot to mention that I understand that each cob itself won't exceed the max voltage but my concern is the voltage output of the actual driver pushing all cobs in a series through each holder. I'm not even sure if that makes sense but that is the best I can do. LOL.

I have been searching like crazy and can't really find an answer on this. It sucks because I felt like I really did my homework on picking the right components as far as heatsinks, cobs, and drivers that would be compatible with each other. Never even once did I think that a cob holder would be what held me up.

Yeah I had the same issue with my clu058s, my voltage was only a fraction over the BJB limits but I figured I would air on the side of caution and just sacked off using holders. It would of been a whole lot easier with holders though. Not a massiveissue because I'm running bare anyway.
Perhaps @CobKits knows of an alternative option?
Other than that run them on two drivers instead of one

I have 10 cobs at 36v a piece, and at first ran 2 parallel strings of 5 to get the voltage down.
I have since changed that to two separate drivers. It worked fine both ways.
Only changed to two drivers because the single wasn't a great match and was maxed out on the voltage side.
An hlg-320h-2100a or b would allow you to run two parallel strings with a single driver.

Boatguy said:

I have 10 cobs at 36v a piece, and at first ran 2 parallel strings of 5 to get the voltage down.
I have since changed that to two separate drivers. It worked fine both ways.
Only changed to two drivers because the single wasn't a great match and was maxed out on the voltage side.

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as bad as I hate to, I may have to run them parallel. My only worries were if one cob malfunctioned but I guess running them at 1050ma the other cobs should have no problems covering a cob if something happens. I think I could actually use the bjb holder then. Thanks for the help.

Just one more questions and I will leave you good people alone. lol. Is my driver designed to run parallel also or does it really matter?

Parallel isn't ideal for the cob's but with only 2 strings its not that big of a deal. When you run parallel it doubles the amps needed, and cuts the amount of volts in half. So the driver you have wouldn't be adequate because its amperage range is 500ma to 1050ma.

I would keep the 6000k and 3000k cobs on separate strings, if running parallel, or using two separate drivers.

I wonder how much voltage BJBs can really take. Even thin wires can take a surprising amount of power. I bet they could really take 250v without a problem. Worst case scenario one burns out. Wouldn't actually hurt anything, just the lamp would stop working. There's heat sinks on them so how hot could they get?

I do know the binder and wirth holders have a HV (high voltage) version for the CLU058, not sure on smaller COBs. I think 450v is the max on HVs.

Boatguy said:

I would keep the 6000k and 3000k cobs on separate strings, if running parallel, or using two separate drivers.

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The 6500k and 3000k will be seperate units. There will be 8 cobs per hlg320h-c1050b all on their own pin heatsinks. My veg area will have 2 of these 8 cob units at 6500k and my flower room will have 4 of these 8 cob units a 3000k. So 48 cobs on 6 drivers at 8 cobs per driver. That would give me 1 cob per sqft in a 4x4 veg area and 1 cob per sqft in a 4x8 flower room. From looking at the spec sheet these drivers have an output of 311v at 1050ma which I'm sure real numbers in voltage are probably more. I'm probably going to have to just mount these cobs to the heatsinks and solder to each one in series. And the ground wire coming from the driver into the plug only has to be spliced and attached to one of the heatsinks, right? That was my understanding anyway when I did my reseach. I really do appreciate all the help. I just want to get through this and get back to growing again. lol

nevergoodenuf said:

I do know the binder and wirth holders have a HV (high voltage) version for the CLU058, not sure on smaller COBs. I think 450v is the max on HVs.

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Thanks bro. I will definately search for those.

I get them at CDIweb.com

I am going to contact rapid led and send those drivers back per their return policy. It shouldn't be an issue. I think I will be better off running mean well hlg-120h-c1050b drivers. One per 4 cobs. That will allow me to better max the driver out and to use bjb holders. I think it will work out better all around. Thanks again for everyones help.