Unless I have your project on my side, setting up reflections is just going to take some tinkering and experimentation with what works best for your scene. If all of your objects are static then you don’t need to case any static shadows. You will get good performance using static lighting, but the visual quality might not be as good as if you were using movable lights. Movable lights do incur a performance cost the more dynamic shadows it is being called to cast.