I just spent a week in Philadelphia and had many meetings with planning officials from the city. One of the more interesting ones had to do with the Centre City BID (BIA to us). Unlike Toronto, the entire downtown of Philadelphia is all one huge BIA. Their BIA has come up with the idea to light up most of their buildings and I was there to see the start of this project. It makes me wish B.A and many more buildings in Toronto could be lit up at night.
Another interesting thing, 2 towers in Philly are experimenting with different lighting techniques. While I was there, many floors had one light which would flash about every second. Not every window had a light, and they didnt flash all at once so it looked pretty random. Its such a small and easy thing to do, but it was fun to look at.