Hm, now i am really confused. With path tracing the light is correct but the render times increase a lot. So i switched back to UHD to see the difference in speed and now the frames also render without a lighting difference. I checked the overrides as before. I have a jpg with corona colorcorrect in al 3 slots. Unchecking them solved the problem but going to path tracing and back to UHD also solved the problem?