I get SAD, and I live in coastal southern california! I tried the full spectrum lights. It was inconvenient - you expose yourself to the light (shining into your eyes) for I seem to recall 45 minutes in the am, first thing upon arising from bed. I read the newspaper. I got some tanning/freckling. And my opthamologist was not cool with it. And it didn't work. Tried Wellbutrin - I think it worked - a tiny bit- because of the palcebo effect. this spring, my internist started me on Vitamin D (50,000 units of ergocalciferol) he checked my vit D level first with a blood test. I am on it primarily for my osteoporosis (along with fosamax and estradiol) but he said it is also linked to reduced rates of colon cancer and heart disease. But I noticed that once the days started getting shorter, I wasn't getting the short days blues - for me it's a remarkable improvement. I am quite pleased, and apparently my bones, colon and heart will be too. Tokie