Re: LED overvoltage life expectancy ques.

On Sat, 24 Mar 2007 04:19:27 -0700, frenchy wrote:

On Mar 23, 11:45 pm, "n...@xxxxxxx" <Alien8...@xxxxxxxxx> wrote:
If you're talking about a lamp designed as a direct replacement for
an incandescent lamp except it has LEDs instead of a filament, it has
other circuitry within that will strongly influence the answers to
your questions.>>

Yes these are direct plug in replacements for 44 and 555 bulbs. So
they have built in resistors or whatever else is necessary in them.
They are specified for 6 vac and I put them in a pinball that runs
44s, but later found out the pinball doesn't run pure 6 vac to the
bulbs, it duty cycles them with a peak of 18v. For a 44 the result is
it still looks the same in brightness as pure 6 v, but sounds like the
led is being overdriven in this cycling. So have gotten various
answers from pinball folks that this will reduce the life of these
leds.

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.

Hope This Helps!
Rich


.

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