How Window Washers Almost Sunk Salesforce Tower's Interactive Light Sculpture

Tekla Perry writes: More than 11,000 light fixtures, 8 LEDs in each, 1000 drivers, cables for data and power snaking through multiple floors to a central computer, cameras around the city sending images to the cloud, where AI selects the most interesting ones for display—that's only some of the technology involved in the light show at the top of Salesforce Tower. EE and artist Jim Campbell explains it all--and how the window-washer problem stumped him for nearly a year.