Nice work there! As a bonus, I’d suggest turning on Ambient Occlusion to give your scene a bit more photo-realism. Also, don’t use Spot lights that much. Personally I try to avoid them if possible as they don’t produce the necessary quality.
If you need to light your interior environment try using rectangular, omni or sphere lights + emissive materials. Spot lights give extremely sharp shadows, that’s why you see that wave-like pattern, because you have them hanging from the ceiling in a row.
Regarding those pesky white spots, they come from the artificial lights, mainly those Spots lights (if I’m not wrong). Under the Color Mapping tab in V-Ray settings, put a checkmark beside “Clamp output” and “Sub-pixel mapping”. That should get rid of them.
