Question

Which gas can be filled in GLS lamps?
1. Carbon dioxide
2. Oxygen
3. Xenon
4. Any inert gas

Answer 1

Correct Answer - Option 4 : Any inert gas

GLS:

• GLS lamp stands for General Lighting Service; Standard GLS lamp is an incandescent lamp with a coiled tungsten filament
• Incandescent lamps produce light as a result of the heating effect of an electrical current flowing through a filament wire
• At the centre of the lamp there is a filament. Any inert gas can be filled inside the bulb. Normally, argon with nitrogen is used.
• As it is a highly resistive circuit, the power factor of GLS lamp is very high and ideally, it is unity
• In the case of frosted GLS lamps, the frosting of the shell is done by acid etching
• Acid etching creates a very smooth, glossy and satin finish and the acid-etched lamp is maintenance-free as it does not show dirt marks or fingerprints.