On Tue, 04 Apr 2006 00:26:27 GMT, HFguy wrote:

David wrote:
On Mon, 3 Apr 2006 15:05:21 -0700, "Caveat Lector"
wrote:


Since 1901 !!!!!
URL:
http://www.energyquest.ca.gov/time_m...lightbulb.html

Better still -- check up on the old bulb -- live video -- URL:
http://www.centennialbulb.org/photos.htm



Any bulb will burn for decades if the voltage is low enough.

Also the fact that it's been on continuously. Incandescent light bulbs
seldom burn out while they are on, unless dropped or hit. Failures are
caused by the current surge when it's turned on. However they must have
had power failures during the many years the bulb has been there. I
wonder how they protect it from surges when the power comes back on.

The filament has high resistance. The current never gets high enough
to stress it. I'm surprised it survives earthquakes.