Custom dimension sky daynight cycle

I have a custom time day night cycle systems in my custom dimensions (planets that is). I have sun and other object logic, the last thing I'm missing is the sky brightness by custom time - I'm sure this is probably only possible with custom code. My custom time is a list variable. Using 2024.3 forge 1.20.1 and world renderer.

If you know any solutions how to brighten/darken sky by custom time specific to dimensions, please help.

Thanks