| 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 lifespan 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 statement(s) given above is/are correct? |
A) Only 1
B) 2 and 3
C) 1 and 3
D) All of these
Correct Answer: C
Solution :
Exp. [c] The lifespan of LEDs is more than that of CFLs and are also more energy efficient. Thus, LEDs are used in traffic signal lights.
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