I show how a clear incandescent light bulb can be used to start a fire. First the bottom of the light bulb is broken off then the filament is removed. The bulb is then filled with water and is ready to use on a sunny day. The light can be focused onto a single point. A tinder bundle can be used and once it is smoldering you can lightly blow air into the tinder bundle until you have a fire. This method of starting a fire will also work for other clear round containers.