Re: LED overvoltage life expectancy ques.

On Mar 24, 2:16 pm, Rich Grise <r...@xxxxxxxxxxx> wrote:
On Sat, 24 Mar 2007 10:59:04 -0700, frenchy wrote:
If you plug one in and it works, it will probably continue to work for
the rated life of the LED. If you plug it in and it blows, then its
life expectancy was zero.>>

Yes they are working just fine. When I plug the same one into the
pure 6vac section of the pinball (one used for general illumination
that's straight off the transformer) it's actually a little brighter
than the ones I have put into the voltage cycled 'feature lamps'
section. So I guess I'm ok. I don't know what the maximum rating of
the leds in these plug-in bulbs are, they are only rated for 6vac use
so that's all I know, they are putting unspecified leds inside of the
lamp casing. Thanks!

Well, it's apparent they already have their own limiting resistor, and
a reverse-polarity protection diode, so you should be fine.

I've found that doing an experiment like this can be the quickest way
to the right answer. :-)

Agreed, particularly when the mfgr doesn't/won't say what can happen
in these circumstances.

Frenchy, if I were you, I'd worry about it and contact the mfgr.
Plain incandescents are cheap and can handle spikes that kill LEDs,
but LED bulbs are still kinda spendy to take chances with. For all you
know the "feature" supply can also supply spikes that will kill your
LEDs.

If they won't say and you're confident the PS is safe, never mind.


Mark L. Fergerson

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