Quick Answer: How Does A Tubelight Work?

How tube light circuit is connected and how it works?

When the switch is ON, full voltage will come across the tube light through ballast and fluorescent lamp starter.

Then gas inside the starter gets ionized due to this full voltage and heats the bimetallic strip that is caused to be bent to connect to the fixed contact.

Current starts flowing through the starter..

Can a tube light work without starter?

When you turn on a fluorescent tube, the starter is a closed switch. … Without the starter, a steady stream of electrons is never created between the two filaments, and the lamp flickers. Without the ballast, the arc is a short circuit between the filaments, and this short circuit contains a lot of current.

Why is choke used?

In electronics, a choke is an inductor used to block higher-frequency while passing direct current (DC) and lower-frequencies of alternating current (AC) in an electrical circuit. … Its low electrical resistance passes both AC and DC with little power loss, but its reactance limits the amount of AC passed.

What is the purpose of the choke?

The choke is usually located towards the upper end of the carburetor, and provides this mixture by stopping the carburetors air supply. When it does that, it also creates low air pressure inside the carburetor to get more fuel to flow through the main circuit.

Are LED lights dangerous?

(CNN) The blue light in LED lighting that is increasingly used in our homes can damage the eye’s retina while disturbing our biological and sleep rhythms, a French health authority warned in a new report.

What is function of choke in tube light?

Explanation: When the switch is ON, in a tube light choke is nothing but the coil/ballast ( inductor) which is used to induce the high voltage across it. as we know that inductor has property to induce high voltage for the brief period of time, this high voltage is required to ionize the gases in the starter.

Why do fluorescent lights not turn on?

A dead fluorescent can be caused by lack of electrical power (tripped breaker or blown fuse), a dead or dying ballast, a dead starter or a dead bulb(s). Check for power first… then the starter (if applicable) and then the bulbs. When all else fails, the ballast should be replaced.

How long do ballasts last?

It is economical to turn off fluorescent lights if they are not being used. According to the Certified Ballast Manufacturers Association, the average magnetic ballast lasts about 75,000 hours, or 12 to 15 years with normal use.

Which gas is used in CFL?

In a CFL, an electric current is driven through a tube containing argon and a small amount of mercury vapor.

Why is Tubelight white?

Mercury is excited by passing electric current which produces UV(ultraviolet) rays of short wavelengths. A white powder which is phosphor is coated on the tube from inside that makes visible white light. You can see this white powder by safely breaking a damaged tube.

What is inside a Tubelight?

A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor, which produces short-wave ultraviolet light that then causes a phosphor coating on the inside of the lamp to glow.

How do you fix a fluorescent light without a starter?

If you do not find a starter, unplug the light or shut off the power, then remove the deflector above the tube and look there, or disassemble the base if the light is a desk or floor model. To remove a starter, press it inward and twist it counterclockwise a quarter turn; it should pop out.

Why ballast is used in Tubelight?

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.

Which gas is used in LED bulb?

A mixture of six inert gases (helium, neon, argon, krypton, xenon, and nitrogen) was introduced as the filling gas of LED bulb.

How do I know if a ballast is bad?

2. Look for warning signs that the ballast is failing.Buzzing. If you hear a strange sound coming from your bulbs or light fixture, like a buzzing or humming noise, that’s often a sign your ballast is going. … Dimming or flickering. … No lights at all. … Changing colors. … Swollen casing. … Burn marks. … Water damage. … Leaking oil.

Do you need an electrician to change a ballast?

get an electrician Any electrical work should be carried out by a qualified electrician . Replacing a ballast is not , in my opinion maintenance .

Is choke and ballast same?

Is ballast and choke same? An electrical ballast (sometimes called control gear) is a device intended to limit the amount of current flowing in an electric circuit. A choke is an inductor designed to have a high reactance to a particular frequency when used in a signal-carrying circuit.

Do LED tube lights need a starter?

The LED tube doesn’t need a starter, but the tube light fitting does to complete the electrical circuit, if you open the replacement starter that you get with an LED tube you would find just a piece of ordinary wire soldered between the two contacts of the starter.

Are all fluorescent light starters the same?

Normally, the difference in wattages in lamps are to do with element resistance for incandescent and length for fluorescent. However: 2D Lamps: The 28W, 38W and 55W are all the same size.

How does a Tubelight starter work?

The operating principle is simple, when current is applied, the gas inside ionizes and heats a bimetallic strip which in turn bends toward the stationary electrode thus shorting the starter between the electrodes of the fluorescent lamp After a second the starter’s bimetallic strip will cool and open the circuit …