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Re: totally OT, except to the extent that it's QRP: LED lamps

Posted by Leigh L. Klotz Jr WA5ZNU on Apr 04, 2009; 12:18am
URL: http://elecraft.85.s1.nabble.com/OT-MFJ-Quality-Issues-tp2582801p2583515.html

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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