[Elecraft] P3 burn-in concerns?

[Josh Fiden]

The lumen output of LEDs decrease over time. The lifetime usually refers 
to the time to some specified depreciation, such as 80% of original 
output. Since 20% reduction in lumens is barely noticeable (eyes are not 
linear), 10K hours has little to do with the useable life of the 
product. Further, that rating is at a specified current and temperature. 
So, if the device is not run at maximums, the life extends dramatically. 
Conclusion: I expect to be long dead before the display poops out!

73,
Josh W6XU

On 3/11/2013 11:32 PM, Alan Bloom wrote:
> The data sheet for the display we're using specifies an LED lifetime 
> of 10,000 hours minimum.  I expect that's probably a conservative 
> spec. I've had mine on for thousands of hours so far with no 
> noticeable change.
>
> Alan N1AL