you mentioned hibernation...I just read a book called lights out by wiley and formby and they talk about this exact thing..that we are animals who like to hibernate in the winter...which is why we put on fat stores etc. Recommends 9.5 hours of sleep int he winter, turning off lights early, eating caveman diet of protein and roughage, no refined or processed carbs at least in winter...relates it to depression too. If you have flourescent lights shoot them. Don't watch t.v. late at night . get up with the sun and get outside, glasses or contacts off....mg