This is a solid proof that the LEDs are not serially connected or all would have blacked out at the same time. David --- Richard A Jones <jones@COLORADO.EDU> wrote: > > Keep in mind that the ideal design may have little meaning for the > > application intended. 100,000 hour life of leds for use in flashlights > > for example. How many sets of batteries would you need before you > > approached the 100,000 hours of the bulb? > > Also, these "lifes" are statistical averages--like "mean time > to failure" for disk drives. I bought a 36 LED light for the > Mountain Club cabin: > http://store.sundancesolar.com/12v36ledbudi.html > which has an advertised "approx 60,000-hour life" and it > started failing very quickly--a few LEDs out, then more, > then more. When I sent it back ~1/2 of the LEDs were out > or flickering. Granted, this was not a single LED, but > more complex. > > Maybe they are not "statistical averages" but "statistical > predictions".... > > Richard >
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