As a person who lives in the Nordic countries, the sun is a major problem in here when it comes to sleeping and seasonal mental health issues. Yes, we do get by, but not without a cost. It is a serious interference with grave consequences for some people, and minor consequences for others, but nearly everyone is affected at least in some way.
A few years ago, in the architecture and design museum in Stockholm, I saw an exhibit of a bus shelter that had been fitted with bright daylight lamps for use in a northern Swedish city. It apparently had a measurable impact on depression and suicide when they were deployed.
That's true, I've heard of more people complaining about seasonal mood swings. It'd be interesting to read something in the "mainstream" which at least acknowledged people in "unnaturally lit" areas though.
