formal welcome to the forum.
and… what you see is called global illumination. this is lumen trying to illuminate the ceiling. the “eye” adjustment can be controlled via a post processing volume. there is an option called autoexposure. you should set the min and max brightness to 1. if it uses ev100 you set both to 1 or 0 (what you prefer).
the noise is a result of the windows being rather small. that’s not alot of light information for lumen to spread it. so the result may be a lil unstable. to prevent instability you could add some rect lights to the windows to help boost the light. you basicly fake entering ambient light for the sake of lumen stability.