I don't know how to explain this, but I have several lights during a scene and somehow they get summed up. The first light has 15% transparency, the next the same etc but when the character passes the lights the entire scene gets more and more white/illuminated. After 4 lights it seems there is already a 60% light in the scene. When the character dies it immediately goes back to the normal luminance of the scene. Is this an option I have enabled somewhere or a glitch?
I can't tell if this is normal or not... best bet would be to send an example file to support so we can see your exact configuration.
Actually it were not the lights but an action that had a 0.25 Camera Flash enabled. Sometimes it got stuck at a certain percentage till the character died (it didn't even change with the end of the action duration). Definitely a glitch but glad I could figure it out. Thanks @Andy.