Nautilus:

The light that a city emits is like its glowing fingerprint. From the orderly grid of Manhattan, to the sprawling, snaking streets of Milan, to the bright contrast of Kuwait’s ring-roads, each city leaves its own pattern of tiny glowing dots. See if you can ID these cities based on the way they shine.

I got 13 out of 16 right but I definitely guessed on at least three of them.