Hi Fletch... all I can help with is SAD, as I experienced it while living in Seattle.

A lightbox can help greatly, but they're expensive, and tend to vary in efficacy from person to person. With me, I found that keeping most rooms either filled with as much natural light or full-spectrum light tended to alleviate the lows... which got *waaay* lower moving from the SW to the PNW...

BTW, "full-spectrum" on a CF bulb at Walmart, isn't going to bring the same results as a prescription light therapy device -- but it's better than nothing and much better than burning cash with incandescents. I know a few acquaintances who can vouch for lightboxes but they aren't cheap.

For me, using B12 and keeping a strict sleep/wake cycle felt much more effective than simply using more light by itself. But going outside and getting natural light (even when it's sloppy and cold as in the PNW 3/4 of the year) gives you an excuse to get other things done as well. The B12 helped me curb my fatigue and eased some of the anxiety and irritability.

Hope that helps...