How does a fluorescent light circuit work?

How does a fluorescent light circuit work?

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).

What type of circuit is used for fluorescent lamp wiring?

The semi-resonant start circuit was invented by Thorn Lighting for use with T12 fluorescent tubes. This method uses a double wound transformer and a capacitor.

What does a capacitor do in a fluorescent light?

A capacitor is used to improve the power factor of the lamp. To prevent the lamp from taking too much current a fluorescent lamp has to have a choke, which has magnetic inductance. As a result large installations of such lamps suffer a poor power factor and resultant voltage drop.

What is the voltage required to start a fluorescent lamp?

“Fluorescent tubes and electroluminescent panels typically require 200 to 600 V for starting and running illumination.” A fluorescent light is a type of gas discharge tube, which contains an inert gas (such as argon, neon, or krypton) and mercury vapor.

Can a fluorescent light work without a ballast?

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.

How tube light circuit is connected and how it works?

How tube light circuit is connected and how it works? When we give the power to turn on the tube light, the voltage comes to this side with the help of starter and ballast and due to full voltage, the gas in the starter becomes ionized and heats the bent bimetallic strip to be connected to a fixed contact.

Is a ballast a capacitor?

Ballasts vary greatly in complexity. They may be as simple as a resistor, inductor, or capacitor (or a combination of these) wired in series with the lamp; or as complex as the electronic ballasts used in compact fluorescent lamps (CFLs) and high-intensity discharge lamps (HID lamps).

What are the 5 parts of fluorescent lamp?

Compact fluorescent components consist of cover, coil glass tube, phosphor coating, mercury vapor, ballast, ballast cover, and base.

Is it safe to bypass a ballast?

Safety risk The most significant negative to a ballast-bypass linear LED is the risk of electric shock since the sockets carry line voltage. It’s a common practice to place a finger on the lamp pins while you are trying to install it, and this becomes a risky endeavor when using single-ended ballast-bypass lamps .

What is the difference between a ballast and a driver?

Light Ballasts. Both LEDs and fluorescent lights require a buffer between the lamp and the power supply. While fluorescents use ballasts, LEDs use drivers.

Why starter is used in fluorescent lamp?

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.