Now the filament is made of a metal called tungsten. The only problem is that out light bulbs don't seem to last very long. It is glowing in a General Electric building in Schenectady, New York. Fluorescent lights have been around for a while. These lights are very different from incandescent light bulbs.
Fluorescent tubes have no filament to glow.
The gas in the fluorescent tube conducts electricity. Electricity makes the gas release invisible u ltraviolet energy. The ultraviolet energy strikes a luminescent coating on the inside of the tube. The coating is called phosphor. The phosphor coating is what glows in the tube giving off light.