condition mean min max 4 h after light 1389.876344 816.290513 1963.462175 8 h after light 567.8773735 465.30898 670.445767 12 h after light 612.8198825 570.22412 655.415645 4 h after dark 754.2142635 714.169985 794.258542 8 h after dark 1652.518165 1239.95842 2065.07791 12 h after dark 626.371239 626.371239 626.371239