Note that this will take a long time depending on the size of your scene and the number of lights 3.
Unity point light goes through walls.
Place it just behind your wall so that it blocks the light from leaking out.
I ve had a similar problem with my models.
Set your torches up with flame particle systems and then set the point light at the center of the hallway between the two torches.
These options have obvious edge cases that can t be easily resolved.
Applying that before importing your model means that the faces along that edge are not actually connected and a tiny bit of light will fall through as a result.
In that case you ll need to be a bit more clever.
Set the point light s baking property to mixed or baked then bake your lighting data using the lighting tab.
You have a point light source behind some walls.
How to fix indirect lights seeping through walls.
Although you have enclosed the light indirect light from the light source seems to seep through especially on the ceiling and the floor.
You can simulate this in shaders or use raycasts to see if the light is behind a wall.
In blender there is an option called edge split which makes edges sharp.
Shadows are the obvious answer however i assume you are using lite and that s not an option.
2 increase the intensity as you want and you will see that the light is now illuminating just the wall and don t go through.
The particle systems draw the eye away from the origin point between them and the majority of players aren t going to notice that detail anyway.
It s really just a shadow type setting that needs to be set right.