Troubeshooting DIY LED

[Stones]

Thanks for the help Mike. Originally I had used smaller gauge wire but I tore all of that out to troubleshoot the LEDs individually or in shorter series. I guess I can pick up smaller wire and re-solder all of the LEDs to see if that solves the problem as its 16 G wire that I had used for the last pic.

At the time I purchased the LEDs, I didn't know that there was thermal adhesive available to glue the LEDs to the heatsink so I drilled and tapped the heatsink to mount the LEDs instead. It was a painstaking process and I will not be doing that again if i build another LED light.