At this latitude, winter is pretty dark. Today, the sun officially rises at 10:51 and sets at 3:30. So we have a whopping 4 hours & 40 minutes of daylight! Of course, it's overcast today, so there's not any actual sunlight. It diminishes rapidly; tomorrow's sunrise is10:58 and sunset is at 3:30. I believe the sun will set until next year on Novemeber 18th.
This doesn't mean that it's totally dark. Around solar noon the sun is close enough to the horizon that we get a sort of twilight that one could read by. The ground is snow-covered, so what light there is is reflected. When there is a full moon and no clouds it is actually quite easy to get around outside of town.
I've ordered an Aerogarden, and am eagerly awainting its arrival to try a few things under lights. My house plants live unde a couple of flourescent strips we put along the windows they are next to, to make up for the sunlight they don't get for half the year.