I know the state sets (but you know that tool in not a reliable one)
What about some tool that works along lightmix to have some light sets configured to something like day and night render, right inside coronayou can select your lights put them on a "group", work it on light mix and assing a name for it, then with a simple drop down menu you select wich state you want to have active on the scene.
i want to hear about your thoughts :)
THX