Is this light pollution?

St. Louis Gateway Arch
Photograph by Tom Atwood

For years the Gateway Arch was not lit. At night it stood along the riverfront like a giant shadow against the St. Louis skyline. But in 2001 the decision was made to install 44 powerful floodlights at the base of the arch. In this photo taken earlier this year those lights not only illuminated the arch, but also lit up the low, fast moving clouds as they passed just above the top of it. A dramatic photo, but also an example, some would say, of excessive, unnecessary lighting. Is this light pollution? Shutter: 13 seconds; Aperture: f/13; ISO: 100; Focal length: 18mm