I'm very troubled by lighting

So I have a room that is completely blocked off by light, there is the default skylight in the map outside of this room, there’s no exits or entrances to the room whatsoever so no light can get into this room. (it’s where the player spawns but then the walls disintegrate).

However when I build the lighting there are all these weird light rays and shadows in the room, it’s like its baked in, but I need to it not do that. What am I doing wrong/are their any good tutorials on explaining how the light system works in VR?