I've got a PU Scope on my SKS and while I was scouting out Berezino, the sun was just starting to go down so it was getting dark. As I looked at a field I spotted something so I scoped in and to my surprise, looking through the scope made it appear to be daylight. I took a video of this happening. I haven't tried it when it's completely dark yet. https://www.youtube.com/watch?v=VYiiFR2hS10