Downtown Dallas' skyline is getting another light show just in time for the holidays.

As part of the $100 million renovation of its downtown headquarters, AT&T this week will throw the switch on new exterior lighting on its 37-story tower.

The Commerce Street high-rise is getting 106,544 exterior LED bulbs and 190 floodlights in AT&T blue and white colors. AT&T is holding a ceremony Thursday evening to turn on the new display.

The telecom giant's two buildings at Commerce and Akard Street were built in the mid 1980s with white stone and dark windows.

Unlike other downtown skyscrapers, the buildings weren't highlighted with exterior lights.

"The building lighting is going to be different and exciting for that part of downtown," said AT&T's Diane Brandon.

AT&T early this year announced a major overhaul of its 4-building headquarters complex along Akard.

The company has about 6,000 workers housed in the buildings, which date to the 1930s.

AT&T relocated its headquarter to downtown Dallas in 2008.