I have been running four Pairui 250s with 20cobs for about 6 weeks with no trouble. They were fine last night when lights came on, but this morning one looks like it is dimmed way down. I did raise the light last night but it was running fine after i raised it. I soldered the DC side at the driver and wago at the cobs, i guess i will cut out my solder and wago the wires. And make sure the connections along the 5 cobs are secure. If you guys that know more than me ( which is all of you) have any ideas please let me know. I have a hell of a run going and this is going to cost me big time if i dont get it fixed fast.