We use CFL to save electrical energy and to provide sufficient light.

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We use CFL to save electrical energy and to provide sufficient light. The full form of CFL is

Condensed filament light
Compact filament lamp
Condensed fluorescent lamp
Compact fluorescent lamp
This question was previously asked in
UPSC NDA-1 – 2015
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CFL is a type of fluorescent lamp designed to replace incandescent lamps.
The acronym CFL stands for Compact Fluorescent Lamp. These lamps are designed to be smaller and more energy-efficient than traditional linear fluorescent lamps, allowing them to fit into the same fixtures as incandescent bulbs.
CFLs work by passing an electric current through a tube containing argon and a small amount of mercury vapor. This generates invisible ultraviolet light, which excites a fluorescent coating on the inside of the tube, causing it to emit visible light. They use significantly less energy and last much longer than incandescent bulbs, although they contain mercury and require special disposal.

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