Question

Why are compact fluorescent lamps (CFLs) preferred over incandescent electric bulbs?

Answer 1

An electric incandescent bulb is used for light but it also gives heat. This is not desirable. This results in the wastage of energy. This wastage can be reduced by using compact fluorescent lamps (CFLs) in place of the incandescent bulbs as they generate less heat.
Hence, compact fluorescent lamps (CFLs) are preferred over incandescent electric bulbs.