Argon. As an inert gas, it makes the filament last longer. Some light bulbs also use Krypton.
argon (Ar)
inert gas
An inert noble gas is used inside light bulbs.
neon and argon
Helium
argon
argon (Ar)
inert gas
An inert noble gas is used inside light bulbs.
Argon
Neon, argon,
carbon
Usally Agron
neon and argon
Helium
Neon
Argon does not react. :)