Lighting Problems in UE4 4.11.2

Awroecreative

Hey guys I've been working on a scene for the past few months and have started to properly play about with lighting, tonight I got my lighting exactly how I wanted it and then I hit bake... after the bake finished it seems to have sucked all the light from the scene into the temp door prop, I've spent the last hour trying to search everything and came to no luck, if you guys can helps I will be very greatful.

Many thanks!

Obscura

Do you have a lightmass portal there?