Heck, it can make financial sense too. We tend to keep our windows covered most the day regardless of season. In winter it helps to keep the heat in and there's

Heck, it can make financial sense too. We tend to keep our windows covered most the day regardless of season. In winter it helps to keep the heat in and there's no natural light to miss out on anyway. In summer it helps to keep the heat out, and we mostly don't care about natural light in the apartment because we're outside enjoying the weather. (What's even the point of living in the city with the highest % public green space in North America if we're going to just stay at home bingeing Netflix all evening?) And you can't necessarily see the lights on when somebody's home because we use the most blackout-y blackout curtains we can get. Urban light pollution has gotten so bad - especially since the switch to superbright LEDs - that they've become a sleep hygiene necessity.