Starting next year, it's lights out for certain types of light bulbs in the United States.
Under the Energy Efficiency and Security Act of 2007, signed into law by then- President George W. Bush, light bulbs must become more efficient in terms of energy used to generate light.
That means some incandescent lights are phased out. And you'll more than likely have to choose between a compact fluorescent (CFL), light emitting diode (LED) bulb or halogen.
For example, instead of burning 60 watts when you turn on the lights, you could use about 9.5 to 12 watts, depending on what type of replacement bulb you install.
Upgrading to 15 of the CFL or LED lights could save you about $50 a year on your electric bills.
"We don't have to produce as much energy," said Richard Fletcher, a department head at Home Depot. "You reduce your overall environmental effects on it, plus, it's much better on your pocket book."
Some stores still have the incandescent bulbs in stock, and will continue to sell them and have them on the shelves until no more stock is available.
If you're heading out to buy Christmas lights this weekend, Richard says LEDs are becoming really popular because they don't get as hot, and you can change colors with a flip of a switch.