Ron, I have had two CFL’s fail that were well beyond a “puff of smoke”. Both were actually melted and charred black. They were from two different manufacturers. I also have had CFL’s simply quit after a few years, and the base of them was brown from overheating.
That is part of the reason why I converted all bulbs in my house to LED. 73 Bob Nobis - N7RJN [email protected] > On Feb 2, 2016, at 10:44, Ron D'Eau Claire <[email protected]> wrote: > > That sounds like the CFL failed as it was designed to fail. > > CFLs draw more current as they age. Eventually the power supply is > overwhelmed by the current demand and fails. All the CFLs I've seen use a > tiny (1/8 or 1/16 watt) resistor as a fuse. Before anything else gets > overloaded enough to fail, the little resistor acts as a fuse and opens. > But, being a resistor, it fails like a resistor often with some smell and > brief puff of smoke. I suppose it might be possible for a flame as the > covering burns, but that should be inside the base enclosure. I've never > seen anything but a small puff of smoke if I am looking in that direction > when it goes. > > 73, Ron AC7AC > > > > -----Original Message----- > ... a couple of those so called "5000 hour" Chinese CFL's actually burned up > (yes, smoke, fire and flames) > > Jim - W0EB > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
