I know how to add light sources and stuff. But I want to know how to make the entire dungeon almost pitch black.When I walk in I want to have to use Night eye pretty much with the exception of the areas I have added fire light and torches...

On the toolbar, >World >Cells.

That contains the properties of the cell, like lighting.

Figured it out but thanks anyways... Nice thing about this creation kit is you can usually figure it out with enough messen around.