Make nights pitch black, customise the lengths of day/night cycles, enable night only attacks and darken space platforms/distant planets as they get further from the sun! All configurable.
Seems all settings are start up only AT LEAST if this mod is added in the middle of a game (I wanted darker nights and the misfire mod), there anyway to change settings if this is added after you start a game? Not going to start a new save for a long, long time. I found Rampant for 2.0 and fell in love.
Startup settings are settings that are defined when the factorio exe is started. They should all apply to in progress games, you can change them any time, no hassle!