Latest UPSC Aptitude Question SOLUTION: What is the difference between a CFL and an LED lamp? [UPSC 2011 (CS-P)] 1. To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semi-conductor material.

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(#M40024987) UPSC question Mental Ability Keep an EYE

What is the difference between a CFL and an LED lamp? [UPSC 2011 (CS-P)]
1. To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semi-conductor material.
2. The average life span of a CFL is much longer than that of an LED lamp
3. A CFL is less energy-efficient as compared to an LED lamp.
Which of the statements given above is/are correct?

Asked In UPSC MAN (10 years ago)

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