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
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This question was previously asked in
UPSC NDA-1 – 2015
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.