An Energy Star-certified LED bulb uses 70%—90% less energy than an incandescent bulb and lasts up to 25% longer. Prices on LED (light-emitting diode) bulbs have dropped dramatically; many sell for $10 (or as low as $5 with some utility rebate
programs). Replace 20 bulbs in your home to an Energy Star-certified LED bulb, and with an average of three hours of use per day, you should recoup that $200 in a year and a half and save about $135 a year on your electric bill. Another way to think about this is: If you put an LED in a baby’s nursery today, it could still be working by the time the child went
to college! [Hat tip: Trinh Hinson (Source: AARP)]