Question

One example of an energy-efficient device is a(n) a. fluorescent light bulb. b. drafty window. c. incandescent light bulb. d. gasoline-powered car. Please select the best answer from the choices provided A B C D

Answer 1

a. Fluorescent Light Bulb

The cost effectiveness of turning fluorescent lights off to conserve energy is a little complicated. For most areas of the United States, a general rule-of-thumb for when to turn off a fluorescent light is if you leave a room for more than 15 minutes, it is probably more cost effective to turn the light off.