Although you have enclosed the light indirect light from the light source seems to seep through especially on the ceiling and the floor.
													
																	Unity light passing through walls. 
									
	
		
	
																	You have a point light source behind some walls. 
																	Set the point light s baking property to mixed or baked then bake your lighting data using the lighting tab. 
																	This solution works in other engines like unity and ue4. 
																	If either of these don t solve. 
															
													
									
	
		
	
																	You can simulate this in shaders or use raycasts to see if the light is behind a wall. 
																	Light passing through walls 1. 
																	Shadows are the obvious answer however i assume you are using lite and that s not an option. 
																	This solution works in other engines like unity and ue4. 
															
													
									
	
		
	
																	Create a unity primitive cube plane etc sized similarly to your wall remove its collider and in the mesh. 
																	This is a quick fix for the light bleed that i was having a while ago. 
																	These options have obvious edge cases that can t be easily resolved. 
																	That s why shadows exist. 
															
													
									
	
		
	
																	By sydon thursday november 2 2017. 
																	In that case you ll need to be a bit more clever.