Appleton Baymaster C high bay fixture from school!

This is a cool 1980s high bay fixture. My former elementary school has (at least a few left) similar fixtures. Although this particular fixture came from our workshop at the school I currently attend. It used to be a gym, hence the wire guard. These Appleton fixtures replaced the (probably) MV high bays in most schools of the area in the late 80s. In my school, they were still giving non-specialized classes (French, Maths, Chemistry, etc.) by that time, so there was a gym. 5 or 6 years ago they stopped non-specialized classes, so the Electricity department requested the gym to convert it into a 2nd workshop, much bigger with enough room to give 4 classes to 4 different groups at the same time (1 in 3-phase transformers, 1 in service masts, 1 in heating systems and 1 in lighting systems), although it never happens! Since the conversion there's no need for fixtures with wire guards anymore.

The old high bays, which were the first generation of MH fixtures, are changed as they stop working. This particular specimen still worked though, it was replaced due to a very noisy ballast. Since the latter is 347V only, I removed it and will use the fixture with incandescents. I still remember the high bays in my former elementary school, they had wireguards as well, minus the central removable part.