The problem, cjbecker, is the 'definition' of shade and dullness. It is 'all over the place' and one's state of mind cannot pinpoint that intensity level easily. Sun is sun and accommodation can be made for it appearance according to specific time of day, time of year, etc.

dasBlute, I studied classical piano for twelve years in my youth and never, ever had perfect pitch. Not everyone has that. But even you admit to having to use that 'iight meter' analogy: the 'tuner'. - David Lyga