The debut of the "18 Seconds Movement" encourages Americans to replace incandescent light bulbs with more energy-efficient "compact fluorescent bulbs." You'll see ads on the Internet and in movie ...

In the U.S., a 2007 law mandated that manufacturers must ensure that 40-watt bulbs draw no more than 10.5 watts of energy, while 60-watt bulbs must draw no more than 11 watts. Featured Video An ...

A 40-watt incandescent bulb can be replaced by an 11-14 watt CFL because the lumen ouput is approximately the same (490); a 100-watt incandescent can be replaced by a 26-29 watt CFL, both ...