As long as your gun or bow is in the case before/after legal shooting hours, no issue. If its a night vision rifle scope and you have one in the chamber, thats another story. I have sat out sometimes after dark and watch deer. They are supremely more confident after dark, even if they know you are there they will come and check you out. It works best on clear nights with a good moon. On a true dark night, I can't see very far with my old night owl monocular.