From: Mike N. 

On Wed, 21 Mar 2007 19:26:41 -0500, "Glenn Meadows"
 wrote:

>Too high a voltage to get the brightness level up??
>
>--
>
>Glenn M.
>"mike"  wrote in message
>news:iai303ljuladekdc937g6jrqosmaer3ama{at}4ax.com...
>>
>> Traffic lights around here are LED.  Quite a few LEDs burn out.
>>
>> However, the burn-out is so quick, I'd almost wonder if they had a
>> manufacturing defect.

  Perhaps a design defect - there is a big issue with heat on LED traffic
lights - if the heat sink isn't big enough, the traffic light housing is
black on a hot day might raise the temperature above what the LED /
electronics can withstand.

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