LED Failure Modes and Analysis

This is an interesting read on the failure points of LED lamps (geek alert!):
LED Failure Modes and Methods for Analysis — LED professional - LED Lighting Technology and Design for LED, LEDs, OLED, OLEDs Lighting Applications

 

great article Matt!
a little bit technical for our applications but still a few good points to pick up in there

 

Agree...need a dictionary for that article. Informative however.

 

Thanks.
I need to run through it again - does it say to expect a 30% loss of power after 3 years? Or was that considered a defect?

 

That was considered a defect. The degradation of epitaxy layers, which can cause a 30% to 50% decrease (considered point of failure) is due to high junction temperatures and instable current. So basically, if you have sufficient heat dissipation and a quality driver, this should not happen at the 30-50% "failure" levels. Also, don't buy cheap LED's as the epitaxy layers may be of a lower quality and will be more prone to this.

At least that's my understanding.