If there was ever a time to re-think how cities use and pay for their street lights, this would be it.

LED lights — short for light-emitting diodes — are a major game-changer not only because of their efficiency, but because they take street lights into the digital world.

“This is completely revolutionary. Lights are not just lights anymore,” said Mark Verheyden, senior vice president at Atlanta-based Acuity Brands, the nation’s largest LED light manufacturer.

Properly equipped, LED street lights can change colors or dim in the wee hours of the morning to save energy. They can send alerts when they’re about to fail. Police can brighten lights from their patrol cars to check out an iffy situation.