Prop_static is suddenly so dark ;_;

[The Asylum]

So I'm working on a new build of a map, and when I run it to test it out, one of the window props that I've never had any trouble with before all of a sudden decides to go totally dark (see attached pic)

Any idea on what's causing this?

 

[fubarFX]

fast compile does this sometimes.
if this is a normal compile, try using an info_lighting in there