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Discussion Starter · #1 ·
So, I started using LEDs on my planted aquarium about 4 years ago. What is the latest thinking on how long LEDs last, whether their output falls off over time, and whether the light spectrum changes over time? I have seen estimates of light life ranging from 10,000 hours to 50,000 hours. That is a big range. None of the diodes have gone dark, and everything seems happy, but I haven't measured the light output or whether the spectrum is the same as when I purchased (from the old BuildMyLED.com - now out of business). Any ideas out there?
 

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Depends on how much heat they were subjected to..
BML didn't drive their chips very hard so suspect min loss..

If you ran them dimmed.. it could be a long time..


10% loss after 30000 hours at 65C (149F)
65F at the diode is fairly common I suspect..

10 years 10% loss..
 

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Discussion Starter · #3 ·
Thanks. I knew somebody must have done that research. I run them dimmed about 1/3, and they're pretty well ventilated (i.e. not inside a hood). So basically I can tell my kids the aquarium lights are their inheritance. They will be very pleased.
 
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