I bought several of these $4.99 boards from EBAY CHINA to replace the 921 bulbs in my ceiling lights and they all still working. I do have one board that has a three LED group that is out. I bought four or five spares thinking they would not last very long being so cheap. Haven't used one yet haha... This was back in 2010 I think it was...
Google Images
I originally purchased several of those more expensive boards that had built-in regulator chips and they all caused RFI interference to my Ham radio and HDTV equipment...
Lesson learned here was just buy one and try it out before dumping $150 dollars into it...
Roy Ken
