As part of an assignment for a CGMA lighting course I had to relight multiple Unreal Engine demo scenes.
I was provided with the complete scenes without any lighting and had to make my own lighting for them.
I spent roughly 5 to 12 hours on each scene - lot of time spent waiting after Unreal Engine light baking process :o
If you're interested in reading more here is a small interview I did regarding the course content:
https://www.cgmasteracademy.com/interviews/bruno-fontan/
Subway Lighting