Well about dark nights i don't know is that some kind of glitch but sometimes i can see quite well at night and sometimes its so dark that i cant see anything even my character in 3D mode. At first i thought that how dark night will be is defined by clouds. If sky is clear then you can see better and if there is lots of clouds light drops. But after few days of play i noticed that there isn't any difference between clear and cloudy sky. Well i would like that flashlight would go to utility belt not i secondary weapon slot.