Thanks to Troy Adams for the photo. The light beaming up from Lumen Field has drawn a lot of questions this past half-hour, and the answer seems to be that it’s in advance of The Weeknd‘s concert there tomorrow night (Thursday, August 25). Haven’t verified that, but it does bear a resemblance to the art on his webpage for the tour, which is titled After Hours Til Dawn.
P.S. Past sky-high beams of note include a Microsoft promotion in 2009.