</font><font color="blue" class="small">( Anyway, LED technologies will soon render the light bulb obsolete )</font>
Naa. I doub't it. Not for a looooooooooong time to come. Too many other uses for incandescent lamps for -other- than lighting purposes, where a LED simply would not be an acceptable replacement.
The designers of the solid state transistor said the same thing about vacume tubes. And here we are in 2005, and the best guitar amps are still the 'warm tube amps'.
Many applications use a lamp as a heating element.. LED would not be suitable there. Some appliances use a lamp as an excess load indicator/power bleeder/fuse, etc.
Soundguy