light (path) and rendering problems

Hi guys

I’m a bit desperate with my blender scene I set up. First sketch I rendered was almost like I wanted it. The spots are point lights. From behind comes sun light.

Unfortunately I probably did something wrong with the lighting path or render settings (no clue). Now it renders like this:

Anyone knows how to set up rendering or light paths or had this issue before? Or where I could post this issue to get help? (Unfortunately cannot upload .blend file here).