light bulbs

[einsteinsdog]

Why do light bulbs wear out ?

[Clanad]

You are especially inquisitive this evening... As you probably know, the thin wire in the bulb is made of tungsten and the bulb is filled with an inert gas. The tungsten heats to nearly 4000 degrees F and in doing so, some of the tungsten's atoms fly off and the filament degrades. It eventually wears a thin spot, breaks, et voila...

[dannydingbat]

Because the makers make them to wear out. That way you will have to keep buying them.

[einsteinsdog]

Thanks for two good answers , spot on .Im closing this question now as nothing remains to be said on it.

[NewDazzler]

Hey dude, you rated your own answer, how cool is that ?

BTW Clanad is essentially right