condition mean min max 4 h after light 1048.385 1038.94 1057.83 8 h after light 798.431 777.65 819.212 12 h after light 637.6315 619.847 655.416 4 h after dark 671.421 618.661 724.181 8 h after dark 987.5645 981.691 993.438 12 h after dark 1106.9250000000002 1097.14 1116.71