It's the kind of light I think about when musing on cthulhu.
I really prefer natural light, then incandescent, then florescent. So much so that I'd rather have or work in dim natural lighting than strong florescent. I can't count the times someone has come upon me "sitting in the dark" and blasted me with electric light when really, I'd had plenty of light to begin with.
I wonder sometimes if it would be possible to design a house that was lit primarily with natural light - you'd need to have electric lights after sundown or in closets and on really grey days, of course - but I think with the clever use of skylights and mirrors you could probably arrange things so it would work.
Then there are these lightbox things - holyoutlaw's post the other day reminded me I've been meaning to do some research on them.