Forgive me Futurerave for being so “direct” but, for my opinion, your approach in learning Archvitz lighting/rendering in Unreal is totally wrong (and maybe the metod you use in lighting a scene is wrong too): copying and pasting a whole “structure” of a good project into an empty one, won’t let you understand how the things works inside Unreal, and you can’t think, even if the project comes out good, to have learnt something; and even conitinue adding lights into a scene when the ones that are already there aren’t tuned-up yet, it’s a sort of “non sense”. So, what are you going to do?
Come on Futurerave!, re start all from scratch (without import other-made “structures”) and think to one thing at time: Place just one light (directional, sky, spot…) and see how it affects your scene…tweak some parameter (but just one at time) and see what comes out and don’t move from that light till it looks ok for your needs, then you can add another light (if needed) and “stay” there till these both works good together…I know that it’s a long tedious job, but I think that this is the only way (maybe someone else could suggest a different one)
…you can post here every single step made and the technique adopted for it…it would be lot helpful for us too :rolleyes: 
Cheers,