I've never tried the lights, but I do try to get outside in the winter as much as I can. Unfortunately, I don't live in a winter wonderland type of a place. Indianapolis gets wet and cold in the winter, but we don't get enough snow frequently enough to allow for skiing or snowshoeing, and I'm not a big fan of riding in temps lower than 35 degrees. So last year I took up running again after a long hiatus from it. I think it helped. I at least made it to February without totally losing it. I also exercised in general as much as I could and really stuck to my schedule in that regard. There was no "but wouldn't it be nice to just go home after work and snuggle with my cats."
Still, I think it would help me if I scheduled a long weekend or vacation in February/early March. That's usually about the time I start to really climb the walls. And I'd be willing to try to lights if my SADD continues to worsen as I get older.
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher