Comment Depends on Latidude as much as Attitude (Score 1) 613
The daylight to dark ratio is approximately constant only in the tropics. There is gets light about 6am and dark about 6pm year round and with almost no twilight between the two. The further north you go the greater the difference between daylight and dark hours becomes until you reach the arctic circle (I left out the southern hemisphere intentionally -- there is very little land at the higher southern latitudes) where there is about 6 months of daylight and six of darkness. The whole thing about DST is so artificial anyway. Until the rail roads set up standard time zones in the US each town and village had its on time based on local noon by the sun.
However, I know that in my case sunlight in my bedroom window makes me wake up more easily and feel more refreshed than being awakened in darkness. This seems to be at least somewhat invariant as to the actual number of hours of sleep I got within limits. Since I inhabit the temperate zone in the Northern hemisphere I would much prefer to just hibernate through the 3 to 6 months of winter (depending on latitude) we have here and not worry about changing from DST and back.
However, I know that in my case sunlight in my bedroom window makes me wake up more easily and feel more refreshed than being awakened in darkness. This seems to be at least somewhat invariant as to the actual number of hours of sleep I got within limits. Since I inhabit the temperate zone in the Northern hemisphere I would much prefer to just hibernate through the 3 to 6 months of winter (depending on latitude) we have here and not worry about changing from DST and back.