If you enjoy the convenience of incandescent lights but still want to save energy, then consider switching to CFLs (compact fluorescent lamps). Designed to replace incandescents, CFLs use 75%* less energy and last up to ten times longer. CFLs come in a variety of shapes and sizes as well as all color temperatures, to suit all of your lighting needs.

* Source:

See how energy-efficient light bulbs compare with traditional incandescents.