How does a battery-powered light bulb work?

[jperentosh]

In a battery-powered light bulb, what is happening in the light bulb that makes it light up?
To understand what I mean by a battery-powered bulb, visit this link: http://science.howstuffworks.com/in...ns/how-to-make-battery-powered-light-bulb.htm

Thanks!

 

[Drakkith]

It's just regular old electrical current flowing through the filament, heating it up and causing it to produce light. The current and voltage for the light bulb is provided by the battery. Did you have a more specific question?