There is argon in light bulbs so the filiment doesn't does combust. However the gas doesn't come out of the bulb unless you break it.
Neon, argon,
neon and argon
Argon. As an inert gas, it makes the filament last longer. Some light bulbs also use Krypton.
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.
inert gas
Argon gas .
Neon and argon are used in the light bulbs. Neon makes those flashy lights and argon prevents the tungsten filament from burning.
Low wattage bulbs have no gas, just vacuum. Higher wattage bulbs typically use nitrogen as it is inexpensive, but some may use argon.
An energy saving light bulb is simply a fluorescent light-bulb in a small housing with a built in starter . The gas used for it will be the same as a standard strip-light which is a tube filled with low pressure mercuric oxide and an inert gas like Argon Neon or krypton.
Argon (Ar)
Argon
Argon and/or nitrogen.