[igjeff]

I'm curious what you're looking for in OSM. I looked at highway=street_lamp and the results were....let's say "sparse".

[Freak_NL]

The lit-key is used on ways and indicates the lighting of it:

https://wiki.openstreetmap.org/wiki/Key:lit

The highway=street_lamp tag indicates that there is a lamppost (which can be a navigational aid), but is a much more detailed form of mapping that should be used in addition to the lit-key on the ways themselves.