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 is the function of a starter in tube light?
Fluorescent starters or glow starters are used to help fluorescent tubes and lamps ignite in the initial starting stage of their operation. Simply put, fluorescent starters are a timed switch. The switch opens and closes until the fluorescent tube ‘strikes’ and lights-up.
Why choke is used in tube light?
The vapor gets excited and produces ultraviolet radiation which interacts with the phosphor coating on the inner walls of the tube light and the phosphor produces the glow of the light emanating from the tube light. A choke coil is used to produce this high voltage across the tube.
What is the basic principle on which the working of fluorescent light tubes is based?
A fluorescent lamp generates light from collisions in a hot gas (‘plasma’) of free accelerated electrons with atoms– typically mercury – in which electrons are bumped up to higher energy levels and then fall back while emitting at two UV emission lines (254 nm and 185 nm).
Is tube light starter a capacitor?
A starter incorporates a small gas filled tube and a RFI (Radio Frequency Interference) suppression capacitor (Also see Capacitor-Insight). Both the capacitor as well as neon gas filled tube are connected in parallel with tube light circuit.
What is the main function of starter?
Introduction. Motor starters are one of the major inventions for motor control applications. As the name suggests, a starter is an electrical device which controls the electrical power for starting a motor. These electrical devices are also used for the purpose of stopping, reversing and protecting electric motors.
What is the function of starter and choke in tube light?
The starter connects the heatting filaments, so they start to emit electrons and after a short time opens the circuit. The current flowing through the choke continues to flow, because the energy in its iductance has to go somewhere, charging the parasitic capacitances and the voltage increases until the gas ionizes.
What is the function of capacitor in tube light?
Fluorescent lamps form an inductive load on the AC mains supply. As a result large installations of such lamps suffer a poor power factor and resultant voltage drop. Adding a capacitor to each lamp corrects the power factor bringing it back close to unity (1.0).
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 |
Which gas is used in fluorescent tubes?
mercury vapor
A fluorescent lamp tube is filled with a mix of argon, xenon, neon, or krypton, and mercury vapor. The pressure inside the lamp is around 0.3% of atmospheric pressure.
What is ballast in tube light?
In a fluorescent lighting system, the ballast regulates the current to the lamps and provides sufficient voltage to start the lamps. Once the arc is established, the ballast quickly reduces the voltage and regulates the electric current to produce a steady light output.
What is function of choke and starter in tube light?
