LED bulbs are rapidly expanding in household use. ENERGY STAR-qualified LEDs use only about 20%-25% of the energy and last up to 25 times longer than traditional incandescent bulbs. They come in a variety of colors, and some are dimmable or offer convenient features such as daylight and motion sensors.
In addition to standard screw-in bulbs, you'll find LEDs in desk lamps, kitchen under-cabinet lighting, and even holiday light strings.