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Mercury, Phosphorus, and Argon are arranged inside of the glass bulb in such a way that it reacts in a specific way.
The mercury vapour is heated to form a gas and then high voltage passed through the tube from one end to the other.
The gas emits ultra violet light.
The inside of the tube is coated with a phosphor coating which lights up (fluoresces) when UV hits it, causing it to emit visible light. Tweaking the chemical composition of the phosphor coating, can provide different shades and colours of light. No coating, gives UV (black) light.
There are two heating electrodes at each end of the tube.
On switch on, current is applied through both heaters via a ballast coil and the circuit completed through a bimetal switch (starter).
The heaters heat up, then the switch opens, causing a high voltage surge from the ballast.
The high voltage causes the mercury vapour to conduct electricity through the tube, at low resistance, causing it to emit UV light.
The current is limited by the ballast coil.
If the vapour fails to strike, then the bimetal switch cools and then closes again, starting again, until the tube 'strikes'. This is what causes the lamp to flicker before coming on.
Once the tube has lit, the low resistance path through the tube effectively takes the starter and heater out of circuit.
The heater ends act just as electrodes into the gas filled tube.
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If the ballast on a fluorescent light blows will the lamp still work?
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six main component of fluorescent tube light
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Which state helps produce light in fluorescent lightbulbs?
How does fluorescent work?
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How does a fluorescent make light?
http://home.howstuffworks.com/fluorescent-lamp.htm
Do light bulbs provide fluorescent light?
No it does not
What is the spectrum of fluorescent light?
light bulb
