Denver's holiday lights are getting cheaper for city taxpayers. That's because Denver won't be taking them down when the holidays are over.

City officials say they've installed permanent high-efficiency LED light panels on city buildings that are lit up for the holidays.

The city says it will save $180,000 a year by not having to put the lights up each fall and then take them down after the holidays. The switch to 2,000 feet of rope LED lights cost the city $275,000. The Wal-Mart Foundation donated an additional $50,000. The panels will stay up all year but will only be on for the holidays.

Governments across the country are switching to low-energy lights. The White House Christmas tree in Washington started using LED lights last year.