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yes he improved the light bulb that Edison invented using the carbon filament.
It made the light bulb have light.
Joseph Swan
A light bulb that uses a filament is also known as an incandescent light bulb.
Light bulb filaments are usually made of tungsten, which has a very high melting point. Occasionally carbon is used as a filament.
Lewis Howard Latimer
Modern light bulb filaments are usually Tungsten not Carbon. However early bulbs used things like silk coated with Carbon. Filament means thin thread. The bulbs are filled with inert gas like Argon to stop the filament from burning up with oxygen. Arc lamps use Carbon rods though.
In 1879, Thomas Edison received a patent for a light bulb that was an improvement of an existing carbon filament design that used electricity to heat that filament in a vacuum so as to produce light that could provide useful illumination. It is called an incandescent light bulb.
In an incandescent light bulb the wire that gives off the light is called the Filament.
The filament of a light bulb overs enough resistance to current flow, that the filament heats up so much that it will glow and produce visible light.
filament
light bulbs have metal contacts that connect to an electrical circuit and a filament. power lights up the filament in the bulb .