>>212306599 (OP)>surface domes Absolutely retarded and unnecessary.
The dome itself would need to be so tinted that you wouldn't get enough natural light in there to make a difference.
You're better off just excavating a big lava dome/tube and then inflating a big bag of air inside, and then just building regular buildings made from locally produced concrete.
Excavate several large cisterns that you can fill with locally reclaimed water to be used for plumbing and irrigation, and more importantly, you have people spend a mandatory hour a day swimming laps and doing water aerobics to counteract some problems with lower gravity, its a full resistance work out and the resistance comes from mass and hydrodynamics, and not necessarily weight so you can keep your muscles and bones from atrophying, and keeping your cardiovascular system healthy.
Then whenever you need to expand your colony its as easy as excavating a new area, inflating another bag, and hook them together with a small tube with airlocks.
Then you just have a few observation towers that peek above the surface so people can go see some sunlight and a horizon.
Though mars does have a really convenient day that's close enough to earth's (its like 24.5 hours long) that you could keep a perfectly natural day/night cycle with local time, and it would only become a problem if you're trying to call someone on earth and you have to calculate the difference and time zone.