I was diagnosed with S.A.D. many years ago. I found myself feeling very down and depressed when the winter months were here, especially in the morning and late afternoons. Chicagoland is known for shorter daylight this time of year.
I was rising and setting with the sun. I found myself wanting to go to sleep around 4:30 in the afternoon then not want to get up until 7:00 or so in the morning. That's almost 15 hours of sleep. That would have been okay if I felt rested when I woke up but I didn't. I still felt tired.
After talking to my doctor about it, I purchased a light box. It helped quite a bit. Nowadays I'm on many psychiatric and psychotropic drugs so the S.A.D. isn't as bad. I have the ability to lay down when I need to. I'm thankful I don't have to work because I know I wouldn't be able to.
Here's a short video about S.A.D. Some of the websites on the right have helpful information.
