condition mean min max 4 h after light 3.1016 2.43079 3.77241 8 h after light 2.064095 1.99412 2.13407 12 h after light 2.8891 2.06813 3.71007 4 h after dark 7.58808 6.05459 9.12157 8 h after dark 4.61205 4.42153 4.80257 12 h after dark 4.1603650000000005 3.60213 4.7186