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  1. What is the difference between a CFL and an LED LAMP ?
    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 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 ?
    1. 1 only
    2. 2 and 3
    3. 1 and 3
    4. 1, 2 and 3
Correct Option: C

N/A



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