condition mean min max 4 h after light 5.71441 4.55021 6.87861 8 h after light 7.2737099999999995 6.8309 7.71652 12 h after light 6.809535 6.57098 7.04809 4 h after dark 14.689 12.8917 16.4863 8 h after dark 7.57503 7.49144 7.65862 12 h after dark 8.7757 8.41734 9.13406