What is the principle of operation in a tube light?
“ As the name indicates, the tube-shaped fluorescent lamp is called tube light.” It works on the principle of low-pressure mercury vapor discharge phenomenon, which converts UV rays into visible rays with the help of phosphor-coated inside the tube.
What are the parts and functions of fluorescent lamp?
There are two very distinct parts to fluorescent lighting: the tube and the fitting. Fluorescent tubes ionise mercury vapour to produce ultraviolet light, which is converted to visible light by the phosphor coating on the inside face of the tube.
What does a fluorescent lamp require?
That’s what creates the light we see when fluorescent bulbs are switched on. All fluorescent light tubes (also called fluorescent lamps) require an electrical ballast to regulate the current flowing through them. Ballasts keep the current low enough so the lamp remains stable.
How is white light produced in fluorescent lamp?
Electrons and Atoms Collide within Fluorescent Lamps
Electrons emitted from the electrode collide with the mercury atoms comprising the vapor inside the glass tube. … It is this coating that causes fluorescent lamps to glow white.
Why is fluorescent lamp important?
Common uses and advantages. Fluorescent lamps give light from a large glowing surface rather than a small intense source. These lamps are commonly used in situations which call for general illumination at an even level such as offices, classrooms, retail stores, hallways, and cafeterias.
What is the function of ballast in fluorescent lamp?
In a fluorescent lighting system, the ballast regulates the current to the lamps and provides sufficient voltage to start the lamps. Without a ballast to limit its current, a fluorescent lamp connected directly to a high voltage power source would rapidly and uncontrollably increase its current draw.
What is the meaning of fluorescent light?
: a usually tubular electric lamp having a coating of fluorescent material on its inner surface and containing mercury vapor whose bombardment by electrons from the cathode provides ultraviolet light which causes the material to emit visible light.
What is the capacity of fluorescent light?
Voltage of a Fluorescent Tube
|Bibliographic Entry||Standardized Result|
|Giangrandi, Iacopo. Driving A Fluorescent Tube. January 13, 2003.||30–100 V|
|Bigelow, Stephen. Troubleshooting, Maintaining & Repairing PCs: Chapter 43 Power supplies, high voltage. McGraw Hill, 1998.||200–600 V|