Understanding radiation analysis scale

Hi all, I’m trying to understand the real-world meaning of the kWh/m2 radiation analysis in Ladybug.

Does anyone know of any resources about or ways of figuring out the real-world impact of various kWh/m2 values? As in, a value over (for example) 400 kWh/m2 will cause excessive solar gain, or something like that? Is there an average value to aim to keep below when placing openings, shading, etc? I’m just not sure what the values I’m looking at actually mean.


File I’m currently working on, for reference, maxing out at ~140 kWh/m2: