Hey guys i noticed the nights are to bright, like midnight seems more like a afternoon, what settings should i change to make it more realistic but not damaging the daytime as well, thank you.

Not tried it myself, but i noticed this mod that could help your problem :
https://www.moddb.com/games/stalker/addons/darker-nights-for-static-lighting

and from one of the comments it seems it work for more than only static lighting

Hi thank you so much, i did some testing and i can confirm that it works, the nightime gets darker and i feel this is much better now, it removes that gray look in the night were you could see everything, so it forces you to use more your flashlight and nvg. i was afraid this could cause problems but so far so good, i recomend using it.thank you <3

That's great ! , adding this mod to the list for my next playthrough too