1. When I look at UE4 light intensity it seems to be set to 3.1415 as default value. 2. The standard Unity rendering, setting 3.1415 with the HDR/ToneMapping/AutoExposure seems ok, but certain things can be over exposed(color been washed out). 3. When using HDRP, setting light intensity to 3.1415 gives me similar looks as UE4. Nothing seems to be over exposed. I don't understand why light intensity is set to this value? What's up with Lux at the side, does it has anything to do with this light intensity, is there any topic explain what I am seen?