Bring that lamp down a little lower.

George, bring that lamp a little closer so I can see what I'm doing.

The light bulb was a fairly simple task, from their standpoint.

For 15 years now I still must use a gas lamp for light.

It's the most simple thing you can make a battery and a bulb, the bulb lights up.

If you wanted to light this bulb for a year, you'd need this much coal.