My father is currently interested in investing into a Ukrainian LED fixture manufacturer, and after he bought home a sample, I'm scared. There are 94 LEDs paired up with diodes, all in series, connected directly to mains voltage. The LEDs and diodes are covered with epoxy, however the ends of the diodes stick out just enough to do some damage.
I told him that the LEDs closer to the ends will die out much faster than the rest, resulting in damaging the rest of the LEDs due to fact that they no longer provide a suitable voltage. On top of that, the diodes will most likely heat up, and in addition to the heat from the LEDs, the components will get damaged considerably faster. The lifetime estimate for this unit is 50'000 hours, however I highly doubt that it will be usable past 20'000 hours. Plus, I'm pretty sure that there are quite a few laws which were violated.
Here are some photos:
Just a couple of notes:
- No, I don't have a link for the product page
- Yes, there is absolutely no other circuitry
- And yes, they told my dad that this could be certified for the EU and
Switzerland…
Your input in this matter would be greatly appreciated.
Best Answer
Have you contacted them and asked them if they realize those diodes had ends sticking out? There is a chance that this was an early test run and they were working out fabrication issues. If you are getting a trial run there could be a design issue they worked out and there could be a fabrication issue they have not recognized yet.
I would suggest as your first step you contact the group that sent you the device and discuss/report the issue to them. You may save them a large amount of money if they realize they had a fabrication issue prior to a full production run. There is also a good chance they have seen this fabrication issue already and have resolved it in production.