Which is the the gas discharge lamps?
Gas-discharge lamps are a family of artificial light sources that emit light by sending an electrical discharge through an ionised gas, i.e. plasma. Typically, such lamps are filled with a noble gas (argon, neon, krypton and xenon) or a mixture of these gases.
How does a gas-discharge lamp work?
The discharge lamps work on the fundamental principle that, light is emitted when the electrons have collided with each other. To obtain this, the first gas an ionized at very high voltage. At low pressure, gas maintained in a glass tube.
What is discharge lamp?
Definition of discharge lamp : an electric lamp in which an enclosed gas or vapor glows or causes a phosphor coating on the lamp’s inner surface to glow.
What are the parts of a discharge lamp?
Operating Components for Discharge Lamps….
- 6.1. Ballast. With discharge lamps, the appropriately dimensioned ballast is an important precondition for the achievement of the lamp life.
- 6.2. Starter Switches.
- 6.3. Ignition Sets.
- 6.4. Compensating Capacitors.
- 6.5. Intensity Control of Lamps.
What are the merits of discharge lamp?
Less consumption of electricity: Discharge lamps consume less electricity in comparison to incandescent lamps because in later lamps to spread light continuous electric current is required while in former lamps electricity requires only to create plasma, once created it no longer needs electricity.
Which are drawbacks of gas discharge lamps?
(i) High initial cost and poor power factor. (ii) Starting is somewhat complicated requiring starters in some cases and transformer in others. (iii) These take time to attain full brilliancy. (iv) Ballasts are necessary for stabilising the current since such lamps have negative resistance characteristic.
What are the uses of the lamp?
Today, most lamps use electricity and a light bulb to shine the light that we all need to work and live comfortably after daylight fades. There are also older-style oil lamps and gas lamps, which are more typically described as lanterns.