The city is on the northern end of the island. The southern side is villages. Not totally dark but not what you are thinking. At 30 miles out, there was no light polution, but fact is, even though running lights can be seen a long ways off, they are small and require constant looking for them. The stern light can be mistaken for a star
at sea.
I have cruised single handed for 5 years and have traveled 30k miles in that time. I did sleep a lot at night when deep out to sea away from normal traffic. I started using 2 Lucy lights behind the dodger pointed at my sails the last year of going singlehanded. I felt much better about that than just the masthead light. When I was not on the lookout, I made sure others could see me.
I remember one time 2 days west of Bora Bora when I got a call on the VHF. They wanted to know where I was going. I could barely see their running lights but I could see them once I was looking for them (and AIS already told me where to look) but they were about 4 miles away. They on the other hand saw me very well - like I smacked them in the face. I knew they were 4 miles out due to AIS but I only had receiving AIS at the time so they didn't have an info on me.
I started using the lights due to the ships at sea being lit up so much at night and I would see them 10+ miles away. I thought it was wise for a single handler. I also liked how it gave the cockpit a bit of background light (I sleep in the cockpit) and lit up the entire deck and sails, plus it didn't use house bank power (solar cells in the lights).
Now I sail with crew but so far I still use the lights at night. I have gotten used to them and really like plus I know there are fishermen out there that are not lit up and their plan is to get out of my way, so I like to make it easy for them to see me. I can still see the running lights of boats and that is all I think I would see with the lights off anyway. It gets pretty dark out there.
Now of course, I am in a different world than most of you and I am not sure what I will be doing when I get to a world where people usually follow the rules
or even know what the rules are.