How to make a top down view level (lighting)?


I am building a top down view level set only inside a big house. I am wondering if I should make a roof to my house and then set its visibilty to false to see the inside of my house (and light outside is bright), or if I should have no lighting beside of my lamps inside of the house and no roof.
I’m not sure I’m clear.
I’m new to Unreal and I’m wondering what’s the easiest or nicest way to do this? (Also, I would like light to shine through windows in the house.