Minnesota winters? Perhaps you have a scandinavian heritage? Back here in south Sweden, dawn is at around 0800-0900, and dusk at 1500-1600. I go to work in pitch black, sit indoors, get back home in total darkness. Literaly put on my peak oil hat, go feed the sheep in total darkness, bring in a days worth of firewood, clean away the droves of rodents left by the cats on the front porch, do some logging, go inside play with the children, make dinner, make love to my beautiful wife, do some logging, go to sleep. Thank god for my portable rechargeable LED lights, and without the physical activity I would be in hibernation 15 hours every day. And it's even worse further up north, but at least they have some snow to light up their existence. Global warming has killed the snow, so here comes winter and pitch black depressions.