Lights?

And how much does it cost to leave all the bloody lights on in the usual office building. During the "energy crisis", lots of offices turned off their lights. Now you can see entire buildings glowing at night. Even with florescent lights, that's still a lot of money. Then there are the billboards lit up at 2am. Haven't they ever heard of Dark Skys? Then there are all the street lights. No wonder the "developed" world glows on the night images.