There is a pretty detailed wiki if you want to work deeper with openstreetmap. It often has examples of how to tag different features. The entry for Lit [1] doe

There is a pretty detailed wiki if you want to work deeper with openstreetmap. It often has examples of how to tag different features. The entry for Lit [1] does not quite say it but it references the street_lamp [2] entry. There it mentions street_lamp should be on a point of the location of the light source and to tag Lit on the surface that is iluminated. So I have been doing Lit on all roads that is lit up by the street lights. [1] https://wiki.openstreetmap.org/wiki/Key:lit https://wiki.openstreetmap.org/wiki/Key:lit [2] https://wiki.openstreetmap.org/wiki/Tag:highway%3Dstreet_lamp https://wiki.openstreetmap.org/wiki/Tag:highway%3Dstreet_lam...