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I was looking back through my temp logs and it is weird it seems like the one that I was talking about running 10 degrees F cooler than the others a couple of days ago was running the same, then another day was 10 degrees cooler. Seems to move around. I am starting to wonder if it is just the...

No one has commented on the parallel wiring, can I run the COB's I have in series off the driver I have if I want? Is there any difference in efficiency or heat based on if they are in series or parallel? So 3 - CLU048-1818 per 185-H-48A in series vs in parallel. One thing I have noticed...

So following what you said above regarding voltage drop. Using a 185H-48A powering (at 100% Vo and Io) 1 1818 cob with the CUTTER-HS14080P heat sink I have, if I power it on with the multi meter across the cob, as it heats up up it should keep dropping because that heatsink without a fan is not...

Actually I must not be thinking clear today. 142 watt is double at 100% then when running 3 (80 watts each) So yeah your right it will kill it at some point.. I am going to have my Raspberry pi checking the temps on the heatsinks every few minutes, so if I loose one or 2 cobs it should shut...

Actually just did a test, with 3 CLU-1818 on the HLG-185H-48 connected in parallel Vo adjusted to like 144 watts the measured voltage was 50.1 volts adjusted to max it was using 241 watts its was measured at 51.5 volts. (Io was at max during both tests) with 2 CLU-1818's in parallel Vo adusted...

OK thanks, I am running them by default at 60% dimmed down, so if 2 go out, the 1 remaining cob will get 60% of the output of the driver. I always thought I had some headroom though if I wanted more some more power I could turn it up. My 6 1818's with the 2 HLG-185H-48's at like 60% run around...

Thanks for the reply. Listed on the product description for the CLU-1818 on cobkits.com it says: CLU-1818 is a nominal 50V COB which can operate up to 4.14A max (approximately 250W) I don't plan on running 1 of these cob's at the full current, the max current on the HLG-185H-48 is 3.9A based...

It was around 430.00 USD including all of the reflectors/holderers without shipping cost.

Heat sinks being used: 6 - CUTTER-HS14080P COB's being used: 6 - CLU048-1818 80CRT Drivers being used: 2 - Meanwell HLG-185H-48A No Fans, wanted passive cooling. I have 3 of the cobs wired in parallel to each driver. I am running the drivers at around 60% output power each (around 150 watts...