Question

which gas used to make bulb

Answer 1

Argon is a commonly used gas used to fill incandescent light bulbs. It increases bulb life by preventing the tungsten filaments from deteriorating too quickly. Other gases such as helium, neon, nitrogen and krypton are also used in lighting. The gases used in light bulbs are known as inert gases.

Answer 2

Heya friend!   Mainly inert gases are used to make bulbs such as Argon, helium, neon krypton etc.   Hope that helps!