condition mean min max 4 h after light 9.079990666666667 4.595091 12.96687 8 h after light 11.253098000000001 8.612402000000001 15.757520000000001 12 h after light 14.842091 8.418292999999998 18.53772 16 h after light 17.549936666666667 12.11241 22.53654 4 h after dark 18.665886666666665 17.37781 19.74145 8 h after dark 68.63295666666667 32.7157 92.7472