Which gas is used in light bulbs?

The gases used in light bulbs are known as inert gases. An inert gas is non-reactive and extremely resistant to chemical change. Inert gases can either be elements or compounds. Due to their inherent stability, inert gases such as argon and nitrogen do not allow a filament to catch fire in a light bulb. read more

Some light bulbs are filled with gas. The type of gas can vary depending on the type of light bulb. As the filament burns, tungsten particles separate from the filament, eventually causing the filament to weaken and break. read more