You may have noticed it over the weekend: All sides of the Kennedy Center lit in cobalt blue and acid green.

"Northern Lights" will illuminate the Kennedy Center each night of  the Nordic Cool Festival. (Photo by Margot Schulman)

That light show, it turns out, was just a test. But last night, as the Kennedy Center celebrated the opening of the month-long Nordic Cool festival, the building officially flicked on "Northern Lights," the massive display that was created solely for the festival.

Mimicking the Aurora Borealis, the project was created by Danish lighting designer Jesper Kongshaug, whose work also includes lighting in the Copenhagen airport and an award-winning design at the Royal Danish Playhouse.

The lights will swirl nightly between 5:30 and 11 p.m. through March 17.

Read more about the Nordic Cool Festival:

Nordic Cool Takes Over the Kennedy Center

Nordic Cool festival events