[stuffssguy]

I did mention that I don't use video post that much right? Anyways, when I come across flickering lights in videos, it is usually because of final gather or global illumination. What happens with those is they calculate how all the lights are going to act in the scene for that frame, finish, dump everything from the last frame, calculate how all the lights in the next scene will act, finish, and have slight variations from the next one. I could go into some more depth on why that happens, but I don't think it is necessary. What I do know is there are quick fixes, and back door methods for thing like that.