The new lights are called LED lights.

Columbia Water and Light says if you use 500 or more large bulbs and run them for five hours per day, it will cost you around $20 or $30.

But if you spend a little more up front on LED lights, it will cost you less than $1 to run those lights.

You could also get 17,000 more hours of light out of the LED bulbs.

"LED lights are definitely one way that a homeowner can reduce their energy costs," Jason Huggler of Home Depot said. "And if you compare them to old fashioned lights, particularly like the C-9, the large bulb style, made out of glass, you get substantial savings. Could be as much as 90 percent savings."

Even the president is going green. The White House put more energy efficient lights on this year's national Christmas tree, which reduced the energy use by 55 percent compared to last year.