Usally Agron
Ordinary incandescent light bulbs are filled with an inert (electrically non-conducting) gas such as Nitrogen.Other types are filled with a gas containing low pressure mercury vapor and argon, xenon, neon or krypton.See the Related links for more information.
The noble gas used in light bulbs and photographs is argon. Argon is used in light bulbs to prevent filament degradation and in photographs to create a stable environment for preserving prints and negatives.
Argon
Neon, argon,
carbon
Neon
In some light bulbs, the gas used is argon or krypton. These gases help to prolong the life of the filament by reducing its evaporation.
argon
Argon. As an inert gas, it makes the filament last longer. Some light bulbs also use Krypton.
The gas typically found in light bulbs is argon.
Argon does not react. :)
Argon gas is commonly used inside incandescent light bulbs to prevent the filament from oxidizing and burning out. It helps to prolong the life of the bulb by reducing the evaporation of the filament material.