I too have had LEDS fail on me, and they came from cointaker. I bought a full led kit for my sttng a couple of years ago, and most of the white insert leds fizzled out in no time at all....
I contacted cointaker about it when making a further purchase, and they replaced every single faulty bulb without even asking for them back. I was very pleased. Excellent service.
I havent had anymore from them in a while due to one quite vital issue that i dont know has been resolved. The plastic that the leds were cased in was very smooth and shiny. They basically kept popping out of the insert bulb sockets after extended play and i found it to be super annoying.
I bought from other vendors and found the plastic to have a 'textured' surface and they stay solid in the insert bulb sockets with no movement whatsoever....
Can anyone tell me if cointaker still sell these type of leds, or has that issue been long resolved?