The high school I went to, had Holophane wall mounted fixtures similar to this:
Holophane Wall Fixture But they were MV and the ones I see on eBay all seem to not have any ballast.
So I'm wondering if these were remote ballasted somehow.
Also, the school was built in 1971 and these were the original fixtures. But many had been replaced with Cooper HPS wallpacks.
The cafeteria and vocational buildings were built in 1989 and have wall fixtures that are bronze colored and with a guard over the glass, which is round and bowl shaped. Those are HPS but a few had also been replaced with Cooper wallpacks as well.