condition mean min max 4 h after light 9.285665000000002 8.652976 9.918354 8 h after light 9.00659 8.85782 9.15536 12 h after light 7.9013895000000005 6.952082 8.850697 4 h after dark 9.5672785 8.993292 10.141265 8 h after dark 9.2365765 8.446746 10.026407 12 h after dark 9.15536 9.15536 9.15536