Everything You Never Knew You Wanted to Know About Berlin
Did you know that looking from high above it is still possible to tell between the former East and West Berlin?
Maybe not during the day, but after dark it all becomes clear: the illumination is different.
West Berlin used fluorescent, mercury arc, metal halide and gas lamps, producing altogether stronger and brighter light. While East Berlin´s main source of street illumination was at some point the cheaper sodium vapour lamp with its orange-yellow and not particularly bright luminescence.
The difference is clearly visible in the 2013 images made by the Canadian astronaut, Commander Chris Hadfield while flying 200 miles above Berlin.