I would imagine that, with the knowledge that hundreds if not thousands of massive killing machines are flying around above their heads, they would have good reason to turn off the lights.Yes I do! I often hang around a 4 billion pop planet and it breaks immersion a bit when they all switch off their lights at night. it's dark, so you wouldn't need any fancy land/water realism. just a random pattern of lights at varying densities depending on total pop.