Conserve energy LEDs generally consume low amounts of power to produce light. In contrast to other types of bulbs, LEDs are more efficient and therefore require less power to produce the same amount of light. The Center for Efficient Energy Consumption conducted a study which states that "LEDs reduce power consumption by more than 60% when compared to other forms of lighting."
LEDs also have a long service life. Frequently switching them on and off does not affect their performance. People do not need to replace LEDs for many years, unlike traditional light bulbs and tubes.
LEDs are more energy efficient. They have an estimated energy efficiency of 80 to 90%. This means that they use 80-90% of electrical energy, and only around 10-20% is lost and converted to heat energy. In comparison, traditional bulbs have an estimated energy efficiency of only 20%.

How does the author support the fact that using LEDs can help save power consumption?
A.
by including a personal experience
B.
by providing data from reliable sources
C.
by stating only personal opinions
D.
by using first-hand accounts of people