Question

Which among the following is more energy efficient?
(A) Incandescent bulb
(B) Fluorescent tube light
(C) Compact Fluorescent lamp
(D) All are equally efficient

Answer 1

As we know that nowadays, the type of lamp is used on a large scale by humans, which is that the lamps have a bent or folded tube that fits into the space of an incandescent bulb, as well as a tiny electronic ballast in the lamp's base.

Complete answer:
Compact Fluorescent lamp (CFL) is more energy efficient among all the given options.
A fluorescent lamp designed to replace an incandescent light bulb, often known as an energy-saving light or compact fluorescent tube; certain versions fit into light fixtures designed for incandescent bulbs.
In comparison to incandescent bulbs, CFLs are up to four times more efficient. You can get the same amount of light by replacing a $100watt$ incandescent bulb with a $22 watt$ CFL. In comparison to incandescent lights, CFLs utilise 50 to 80 percent less energy.
CFLs are more expensive at first, but they save money in the long term since they last far longer than incandescent lights. CFLs are also less expensive in the long run because they use a third of the energy and last up to ten times longer than incandescent bulbs.
Whereas, Fluorescent lights become less and less efficient over time because they must use more and more voltage to produce the same lumen output as the light degrades.
Hence, the correct option is (C) Compact Fluorescent lamp.

Note:
CFL bulbs emit considerable amounts of UVA and UVC radiation, which are damaging to human skin, according to researchers at Stony Brook University in New York. This UV light can age and burn the skin, eventually leading to skin cancer.