Not "certified" by the team, and it might adversely affect other aspects of the modded game - but we don't know since we have not tested it. fitzcarraldo is a reliable source for info though. I'm not certain as to which aspect of the mod package you are going to install, but the scene.dat file is about the only "darker night" thing in there. That file can affect AI visual and other sensor files in the game. The sim.cfg file is another important part of that, and is in another version of a darker nights mod Bubblehead1980 made.