
Switch to LED Lightbulbs
As your old lightbulbs begin to die, replace them with LED bulbs. Led is the most energy-efficient bulb you can buy; they use 75% less energy than your standard bulb. Not only are they just as bright as a regular bulb, but they also last much longer. The average American household has around 40 bulbs. Replacing all of them with LED bulbs saves around $300 a year on the electricity bill.