Lights does weird wavy effects

Hello! I am new to Unreal Engine and i have weird wavy effects on my lights as you can see.

Can’t replace actor lightsources with emissive meshes, unless they are huge (2x2+ meters)

I tried with pointlights and it still does this (less but still here)

Lower the intensity of the emissive relative to the point lights

I am sorry, i am a beginner at Unreal, can you please elaborate?