Try opening a dispute when an item that should last for 10 years craps out just after the disputes window closes. In the case of my LED lights, I had all kinds of failures, some out of the box, some after a few days, some after several weeks. Some were failed LEDs, some capacitors and other components. They were purchased from a range of different suppliers. I had no way of knowing which were from who so I had to just swallow the loss. I suppose I could have marked each bulb with the supplier when I installed them, but who does that?