UN ships were very well lit from what I remember. Martian and Belter ships less so (still, the Rocinante's crew quarters were fine and we've not really seen ma

UN ships were very well lit from what I remember. Martian and Belter ships less so (still, the Rocinante's crew quarters were fine and we've not really seen many ships outside of battle/emergencies) because they were adapted to lower light conditions on their homeworlds, I think that was said once if I'm not mistaken. The Martian delegation to Earth had to wear sunglasses all the time, for example.