The Holdman family display in Pleasant Grove, Utah, uses about 150,000 lights and is 100% wind powered. But if you expect to see a giant wind turbine in their front yard, look again. The Holdmans use renewable energy credits (RECs), which put power back on the grid from a wind energy facility.

Another green solution is Christmas light timers. Having an automatic shut-off time can prolong the lifespan of your lights, and ensure that you don’t over-expend energy.

Solar Christmas lights are another way to go. They rely on a solar panel to absorb sunlight during the day. When the sun goes down, the lights automatically come on.