@ Andy; Hmm if you bust the LOA apart, I think the two chokes are regular 14-20W chokes that can be used to run shorter lamps on preheat unless that's what failed. That color temperature sounds interesting. Smaller manufacturers probably mix leftover phosphors together and their "friday afternoon" lamps have odd color temperatures and such and aren't as uniform as their lamps normally are.
@ Joe; Maybe there are other manufacturers who make/made this fixture at one point or another but yeah, I've seen these before too, though older F40/RS ones with yellowed lenses anda greenish color to the lamps (and with loads of dead bugs too!)
My middle school from 1970 is a split level building. It's two floors with a tiny 3rd floor above the library with a few rooms. The 3rd floor had a balcony that overlooked the library, so the library technically didn't have a ceiling over most of the center. That third floor was "off limits" to 99% of the students though. I think the special needs rooms were located up there. The gymnasium, main offices, and auditorium were on the second floor of the lower half of the split level (at ground level from the front of the building and on the second floor from the back entrance). Below the gym and offices is the cafeteria and the music rooms. There's also a bomb shelter that is repurposed as a stockroom. The cafeteria is at ground level at the back entrance and below the ground from the front of the building.
Then on the higher half of the split level, the science and "unified arts" classes were on the lower level, which was at ground level from the rear and underground from the front. The upstairs had all the "core classes" and the library. The lower level of the higher side of th split level also had all the utilities (furnace, circuitbreakers, janitor lounge, etc).
Here's a shot of the school from above. You can see how the land is sloped, burying the front half of the lower level.