After reading this answer I started to think more about ISS lighting.
In photos and videos from the ISS, the lighting seems to somewhat isotropic; I don't see many strong shadows "behind" or "under" the astronauts or other large objects, and people are fairly well lit from what looks like many sides. Though not perfect, the lighting is definitely more than a bare 60W bulb dangling from a cord in the middle of the
In fact, I also don't recall ever seeing any of the light sources.
Where are the lights "hidden" and how is this ubiquitous lighting of the whole volume accomplished?