Making a Pc game, problem occurs with build. When running the game from desktop, Character flashilight does not work, no errors whatsoever.

Currently working on a game for Pc, everything appears to be working as it should, the problem is that when I build settings and run, or when just building & running through the desktop, the characters flashlight does not work, instead as I walk through the game level there are certain areas where it gets brighter as if shining a light from above the player, which there isnt. As I said before, when in Unity everythings fine, but not outside of it. Thanks in advance & I really appreciate the help. Also, I've noticed that when I build or build & run, my scene becomes darker or brighter & stays that way unless I close & re-open Unity. Thank you once again. (Using Windows 7, Ops-64-bit.)