It was a tongue in cheek retort, David. I too am on a very well calibrated monitor and the bright part of the sky is almost half again as bright as any of its surroundings. Just to check, I compared my Spyder readings on my friend's iMac and what do you know, they were virtually the same. I 'm not trying to be pissy with you or the OP, merely trying to point out what I saw as a flaw. And you are right, we are all entitled to our own opinions. This was mine.