That's interesting. I'll take some photos this weekend and post them. We also have fluorescent fixtures in the CR, CT, and forward and aft torpedo rooms. I naturally assumed that they were installed in the 50's when she was recommissioned.
Our boat has the exact same setup that you guys have with a variety of shaded fixtures, bare bulbs, and fluorescent lights. It seems more and more that they did the bare minimum to the Batfish to keep her running after the war. Every time that I think I've found a cold-war mod, it turns out to be original or wartime refit equipment.
The lights in the crew's mess are unique, because they are the long shop-light variety of fluorescent lighting. They appear to hold two long bulbs (may only be one) and they each have two posts running up to the ceiling. The starter switches are above the large sink next to the ice cream maker.
The fluoresecent fixtures in the other rooms are about 12" x 6" square boxes and they hold two straight/long bulbs. Most have a single starter switch, but ones in the CT have a switch for each bulb. Some work just fine. Others need TLC. The starters are easy to access and are the cylinder type.
Back to the enamal fixtures, we are completely missing one in the junior officer quarters and there is one in the CT that doesn't seem to work - looks like the fourth picture that you posted. I think it is corrosion, but it may not have been rewired to operate for some reason. If it's the latter, I will relocate it to the officer quarters, since the CT has plenty of light.