condition mean min max 0 h after light 7.51532 7.40277 7.62787 4 h after light 3.91894 3.77144 4.06644 8 h after light 2.811175 2.7451 2.87725 4 h after dark 3.56431 3.54532 3.5833 8 h after dark 5.4150100000000005 4.84318 5.98684 12 h after dark 6.541505000000001 5.32054 7.76247