Looked it up on wikipedia, and there appears to be no possible scientific definition of "full spectrum" when it comes to light. IOW, it's a meaningless marketing term. I need more light, for sure, when it has been gray and icky for days and weeks in mid-winter. I'm not sure a bulb can provide that, after reading today.

Curiously, I was thinking about it just today while I was driving home, and the clouds parted and I saw the sun for the first time all week. I think I'm going to try Vitamin D, first.

Karen