I have always wondered about the effect of color temp on SAD. Perhaps I don't actually suffer from SAD, never seen a doctor about it, but I sure do tend to light the room like the surface of the sun during the winter...
Thing is, for me the very blue color temps are just as bad as no light at all for my mood. They make me feel physically cold and depressed. I don't even like sitting in an office building for any length of time, since almost all use "cool white" 4100k tubes.
I get the best "mood lift" with the warmest bulbs I can find. My office at work has 3500k (just plain "white", but looks pinkish to me - all the store had when the company asked) and at home I use "warm white". The temps vary quite a bit there, my CFLs are around 2900k and the fluorescent strips are 3000k. I actually prefer even warmer, but am not going out of my way (or spending extra dollars!) to find them.
I don't have any single Very Bright Bulbs, I just turn on several fixtures to flood the room with light and pretty much eliminate shadows. Couple of floor lamps that shine most light on the ceiling and a desk lamp are usually sufficient, although I have used even more on occasion.
But yes, the best solution if at all possible is to get outside in the sun! Bit of a problem this time of year, though, when I'm headed to work in the dark and the sun is setting as I come home...