The lights are from Ultimate Terrain USA....

They look like that from gound level since that whole program was based on 76m terrain mesh I believe. Hence in some areas if you have a different mesh, especially hilly and mountainous areas, the "city lights" as they are supposed to be, float above the surface quite a bit. Looks kind of funny from the ground sometimes but in this picture it makes for a weird lighting effect since the angle is so flat.