Well as I had posted last week one of my Kessil lights started to flicker like a stobe light. I contacted Kessil last week, and was sent a return adress label to send it back to them UPS. As soon as they saw that the package had been sent they sent me a replacement light.
I recieved the light yesterday, and it is back up on my tank.
I was very happy with their customer service, they took care of it very quick and did not give me grief, just asked some simple questions about the way the light was used. All in all, even though one stopped working I am very happy with the way their customer service took care of me.