What is the use of starter in tube light?

Answer 1

Tube light requires two things to function . Very high starting voltage , and high voltage to continue the operation . The starter is a circuit which breaks at regular intervals . When you break a circuit and start again , high voltage spark takes place . This voltage is further amplified through the choke which is a transformer . Thus at the beginning the starter gives high voltage sparks . Due to this the current begins to flow through the tube and the tube begins to glow. Once the tube starts , the required voltage to sustain is quite low , which is provided by the choke .

If the starter is bad the tube does not start . If the choke is bad or if the gas is low , the tube does not sustain its light .

Fluorescent starters are used in several types of fluorescent lights. The starter is there to help the lamp light. When voltage is applied to the fluorescent lamp, here's what happens:

1. The starter (which is simply a timed switch) allows current to flow through the filaments at the ends of the tube.
2. The current causes the starter's contacts to heat up and open, thus interrupting the flow of current. The tube lights.
3. Since the lighted fluorescent tube has a low resistance, the ballast now serves as a current limiter.

When you turn on a fluorescent tube, the starter is a closed switch. The filaments at the ends of the tube are heated by electricity, and they create a cloud of electrons inside the tube. The fluorescent starter is a time-delay switch that opens after a second or two. When it opens, the voltage across the tube allows a stream of electrons to flow across the tube and ionize the Mercury vapor.
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. The current either vaporizes the filaments or causes the bulb to explode.

Answer 2

starter is basically a capacitor with a bimetallic strip over one plate and neon gas filled in it. when we give supply to the tube light, capacitor gets charged up and choke further boosts up this voltage. This makes the neon gas present in between the bimetallic strip & second plate of capacitor to start conducting. Due to this the connection is made and electric discharge in the fluorescent tube ionises the gas(argon or krypton with little bit of mercury at very low pressure),present in the tube and ultraviolet radiations are produced which on striking the phosphor substance like calcium borate produces the visible light.

Answer 3

It provides a boost in voltage required to start the fluorescent process.

Answer 4

Starter is asmall device in a fluroscent tube light to start the ciruit. Once lit, starting circuit cuts off automatically