Energy-Saving (also called Halogen) Incandescent Lighting

Halogen incandescent light bulbs are simply energy-efficient incandescent bulbs and can last up to three times longer than traditional incandescent light bulbs. Halogen incandescents come in a wide range of shapes and colors and can be used with dimmers.

CFL Lighting
CFL bulbs last about 10 times longer and use about one-fourth the energy of traditional incandescent bulbs. A typical CFL can pay for itself in energy savings in less than 9 months and continue to save you money each month. You can buy CFLs that offer the same brightness and colors as traditional incandescent bulbs. Some CFLs are encased in a cover to further diffuse the light and provide a similar shape to traditional incandescent bulbs. CFLs contain a very small amount of mercury and require special handling ifthey are broken. CFLs should be recycled at the end of their lifespan. Many retailers recycle CFLs for free. Visit epa.gov/cfl for cleanup and safe disposal steps.

LED Lighting
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.

Source of Information : Energy Savers