LED light bulbs

Lighting can account for as much as 25% of the electricity used in your home.  Using light-emitting diode (LED) bulbs, which use a semi-conductor as the light source, can significantly reduce the amount of electricity used for lighting.  LEDs use only 20%–25% of the energy and last up to 25 times longer than the traditional incandescent bulbs. While LED bulbs are more expensive to purchase, they still save money because they last a long time and have very low energy use. 

LEDs emit very little heat. In comparison, incandescent bulbs release 90% of their energy as heat and CFLs release about 80% of their energy as heat, so it takes more energy to produce the same amount of light.  Also, light from an LED is directional, making it more efficient for recessed lighting and task lighting.