condition mean min max 4 h after light 5.1424433333333335 5.03929 5.270980000000001 8 h after light 5.224283333333333 5.01866 5.54563 12 h after light 5.21767 4.91801 5.73102 4 h after dark 5.113243333333333 5.03487 5.19434 8 h after dark 5.1803799999999995 4.964519999999999 5.532109999999999 12 h after dark 5.257936666666667 4.97481 5.81936