CFLs provide the same amount of light (lumens) as standard
incandescent bulbs, but have lower wattage ratings.
A standard incandescent light is very inefficient because much of the energy
it uses is turned into heat instead of light. A compact fluorescent bulb turns
more of its energy into light and less into heat. It uses 75 percent less energy
than standard incandescent bulbs. A 15-watt compact fluorescent system can
supply the same amount of light as a 60-watt incandescent bulb.
The following provides examples of wattage ratings for comparable light output:
Quality of Light
The quality of light produced by a compact fluorescent is comparable to that
of the incandescent bulb. There is no flicker or hum with a compact fluorescent
— characteristics that are generally associated with fluorescent lights.
Compact fluorescent bulbs last 10 times longer than standard incandescent
bulbs. Compact fluorescents are rated for 10,000 hours and incandescents are
typically rated for 1,000 hours. If you have a bulb that is on eight hours
a day, a compact fluorescent will last 3.4 years. If a standard incandescent
were used, it would have to be replaced 10 times.