the first one was carbon filament
Its the wire inside of light bulbs.
The early light bulb used a rather powerful electric current, Did not have a very good vacuum inside it and in some did not use a bulb at all! Today's light bulbs use less electricity and have no oxygen inside them. This makes them more efficient and reliable.
Argon and/or nitrogen.
fluorescent
condensation.
An inert noble gas is used inside light bulbs.
Some advantages of using GU10 light bulbs are the fact that you could avoid the disadvantages of using regular light bulbs. GU10 light bulbs don't have poisonous gas inside of the bulb.
because it doesn't let the light glow
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.
tungsten
you need to remove the inside panel to get to these bulbs
Noble(nonreactive) gases like argon