While I work during the day, I am very much a night owl. Some things I have noticed. I have also served aboard submarines.
Your post makes it sound like people working at night want it dark. This should not be the case where they are working. They should have blackout blinds in their house for sleeping during the day.
- Most building light and home light is not actually bright enough and should be brighter.
- healthy food / snack options. Not a lot of places are open at night
- Keep the building open (HVAC, ability to open doors after hours, etc)
- Have a pass down log for the people coming in at night and work with more asynchronous communications
- Give people on the night shift the power to accomplish their mission. If the authority to do something requires waking up someone on the day shift to approval, it will probably not get done on time and just be passed to the day shift
- Well lit parking lot. You want your people to feel safe, even at night. If you have the funds, a security guard at night on watch would be a good addition