One reason to have skyscrapers in DC: the fun things you can do with the lighting
Right: Schuylkill River and the 30th Street Station, with the Cira Centre building in the background, Philadelphia.
This past Friday, and next Wednesday, the LED lighting system at the Cira Centre in Philadelphia is being manipulated so that people can play Pong, as the bookending events of Philadelphia Tech Week.
See the AP story, "Pong game is writ large on Philly skyscraper," "Pong played on walls of Philadelphia’s Cira Centre; 83,000-square-foot game" from PC Games Network and and this video. The LED lighting scheme at the Cira Centre building is already manipulated as a kind of architectural lighting system.