Your approach is meaningful.
We are bored with 'light pollution' and 'light pollution map' sentences.
Good example of how it works in reality for a particular place.
If you can check it against the
Bortle scale, it will tell what is right what is wrong.
Places are scaled for permanent features, but you are doing for more volatile ones.
If that volatile classification could go further one may evaluate 'good' and 'not so good' star gazing times in their locations.