*breaks it anyway*

lights like that can be used as grow lights for cannabis if you get enough of them (assuming it's emitting a ton of blue wavelength light, which it most likely is), so somebody prolly kept coming along and jacking them, so I can see it.

The old screw in light bulb fixtures and bulbs in the NYC subway were custom made for them and the bulbs screwed in in the opposite direction as regular bulbs to prevent theft.