HEY STOP RIGHT THERE BUDDY!!!!!!!!! NO NO NO NO.
No parallel. I have a parallel light, here's the problem. Thermal runaway!!!!! When you have constant current (series), the temperature of each dice does not affect the voltage drop across each chip. In parallel, when temperature increases, resistance decreases, so the one chip that gets the hottest will be receiving a disproportionate amount of voltage!
That being said, my light has been on 18 hours a day for two years now, so it isn't going to kill your build necessarily. It's just one chip is slightly brighter and warmer than the others, I know it'll be the first to go, but whatever. I made my money back the first run haha.
. Have you noticed any of your COBs brighter than another? I haven't. Are you going to build your next light in series or parallel? Parallel, is so much easier. Chose the wattage you want, and add COBs until you are happy with the efficiency or add more as you can afford them. This gives us the option of the HLG 320-36 and the HLG 600-36. One driver and simple wiring. Sorry I keep pushing this subject, but I don't think it is necessary to play with 200+volts with 18g. and smaller wire. I haven't heard anyone have any troubles running in parallel.
