Note an using 1.07
Lights not changing, you put lights in, move them around or delete them, don't matter, its stuck with what you first did.
Lights on characters, sometimes they are black, level lighting doesn't always work on them, they have there own illumination, stick no lighting in and they will be lit with ambient lighting different to what the level lighting is.Fog has no effect on them, they are not lit to what the fog is in the level.
Ambient lighting is not maxed out, see the image,
We have some brick segments, then I stuck in some pure white segments to check the ambient settings, they are
100 brightness
255 red,green and blue.
See how grey they are, see the white square I put in PS on the image, that's true white, that's the colour they are supposed to be.