Hey,
I'm having a little light bug with my map. I have too much light where it should be almost totally dark.
Here's a screenshot of the room :


There is no light in this room.
I have placed a reflexion probe that covers all the walls.
The probe is going a bit outside because of the roof shape. Could this be the problem?
I have a similar problem in a corridor where there is only a faint light.
In radiant it seems darker than it is in-game

I'm probably missing some very basic stuff (except the volumes kept from the basic map) , like shadow caulk which I've asolutely no idea what it does or how to use it. I also have light bleeding from under the walls if I put a too bright light (even with reflexion probe again).

You could lower the stops of the skybox SSI in APE.