Very Dark inside

Hi guys installed everything, works perfect, here and there a CTD but its a minimum. So 2 questions how to trigger main quest.
But the most important, inside and also outside its very very dark, i cant see a thing without lantern or other light source. how can i get it lighter?

Did you find any solution?
Even with the lantern it is very dark outside (daytime).

Have the same problem, I just press the numpad key -(night vision) or + (predator vision).