Electrical filament
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An incandescent light bulb has a small, thin wire with two bigger wires holding it up. This wire is called a filament. The filament is the part of the light bulb that produces light.
Filaments in incandescent light bulbs are made of tungsten. Whenever an electric current goes through the filament, the filament glows. It may also be known as the electron emitting element in a vacuum tube. To make the bulb produce more light, the filament is usually made of coils of fine wire, also known as the coiled coil.
Electrical Filament Media
A 230-volt incandescent light bulb with a medium-sized E27 (Edison 27 mm) male screw base. The filament is visible as the mostly horizontal line between the vertical supply wires.
A scanning electron microscope image of the tungsten filament of an incandescent light bulb
Elaborate light in Denver, Colorado
Original carbon-filament bulb from Thomas Edison's shop in Menlo Park
Alexander Lodygin on 1951 Soviet postal stamp
Carbon filament lamps, showing darkening of bulb
Historical plaque at Underhill, the first house to be lit by electric lights
Comparison of Edison, Maxim, and Swan bulbs, 1885
Edison carbon filament lamps, early 1880s
How a tungsten filament is made
