Hi Chris, thanks for the quick and detailed response. You didn't mention snow, FredBohl did. You explained your observation with this one sentence: Perhaps FredBohl could post a diagram with supporting formulae that would explain why shooting from inside a hut into plentiful outside sunshine will make the target appear much brighter because your eyes are acclimated (pupils dilated) to the relative darkness of the hut. That's the main premise behind the use of powerful flashlights to blind and disorient people in the dark; flood the wide-open eye with lots of light. We could sure use some of your cooler weather here in south Texas.