Couldn't get enough sweep to enter the box... Just use the KO in the cover, with this handy do-dad. Its the type of thinking that makes your eyes cross.
Mark Heller "Well - I oughta....." -Jackie Gleason
Looks like somebody decided it was far too much trouble to break into the conduit and do the job properly, and this was the quickest way to get the light operational.
The job wasn't started at 4 p.m. on a Friday by any chance, was it?
Well my understanding is that the light that was there before was just a lampholder and a bulb. (Just by looking around).
I'm betting this was done by a building "maintenance" person who had a spare flourescent fixture and bought some supplies at home depot (or similar). I seriously wonder if there's a peice of NM cable in the conduit...