Full form of CFL: Compact Fluorescent Lamp.
What is CFL:
It is type of fluorescent lamp that is compressed into the size of ordinary lamp to replace halogen or incandescent lamp. They provide relatively shadow free lighting. CFL lamps roughly use 3-4 times lower voltage compared to halogen lamps. CFL saves up to 75% of the lighting energy. The tube is filled with noble gasses and mercury. The tube inside coated with fluorescent material usually contain phosphorus.
Working–
High frequency electricity is passed through filaments of electrodes. Temperature increases and a beam of electrons generates potential difference. Electrodes accelerate electron beam.Hence, electrons strike on mercury and argon atoms and radiate UV light. This UV light is converted to visible light. Winds strike the glass coated with phosphor.
Advantages.
1) The quality of light is superior.
2) Four times more efficient than an incandescent bulb.
3) Heat emission is very less.
Disadvantages.
1) Content: Toxic mercury, which is complicated to dispose of.
2) More expensive
3) Below freezing temperature is inoperable.
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