Earth City lights picture from
http://visibleearth.nasa.gov/cgi-bin/viewrecord?5826

Note that this was data from 1995!

Earth lights 2012 is from http://earthobservatory.nasa.gov/NaturalHazards/view.php?id=79765  and data was acquired in April to October 2012. See new lights from tracking fields in North Dakota and new band in southern Texas.