How do I make my indoor lighting dark?

I’m trying to make a game where you can walk outside to the terrain and its bright outside but when you walk inside to the hallways its dark and you have to use a flashlight to see. The problem is my SkyLight is brightening the lighting inside my indoor hallways. It shines right through to the inside and brightens it and I can see everything without any additional lighting other than a directional light. I want to use my skylight to brighten the shadows outside but I want the inside to be completely dark to the point where I have to use a flashlight. How can I make this type of lighting effect? Thanks for any help.

You could use trigger volumes to dynamically adjust it based on if you are indoors or not potentially. Also clamp the eye adaptation to keep that from dynamically brightening your scene too much.