[Elecraft] totally OT, except to the extent that it's QRP: LED lamps

Leigh L. Klotz, Jr WA5ZNU Leigh at WA5ZNU.org
Fri Apr 3 20:18:48 EDT 2009


I've had two multi-led AC Edison base LED lights fail with exactly half 
of the leds off.
I suspect some circuit optimization was done in the driver, with a bit 
of skimping.
Leigh/WA5ZNU
> Hi Allen,
>
> The new LED bulbs are rated for 50000 hours, but this is a guess, 
> because they haven't burned out yet even in accellerated life tests :)
>
> Your older LED lamps probably failed because they were using a very 
> small number of LEDs, driven to very high current. Newer LED bulbs use 
> dozens of LEDs, each running at low current.
>
> 73,
> Wayne
>
>   



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