I am looking for a way to prevent the world space lighting from penetrating through a cave. Is there any type of shrouding or setting I can use that does this?

You should be able to set the global light level for the cell that the cave is in. Unless the cave has non cell loading entrance. Then you can fill in shadows and lights for atmosphere. Note, this is not the same thing as lanterns and torches.

I see what you’re saying about the cell. The cave is an entrance to a grotto / grove and I feel it would be a bit more realistic if it was darker then the rest of world lighting. I’ll try messing with the cell and see what I get out of it.
Thanks.