condition mean min max 0 h after light 9.852595 9.50459 10.2006 4 h after light 8.37568 7.89439 8.85697 8 h after light 7.20224 6.72701 7.67747 4 h after dark 9.418520000000001 8.86027 9.97677 8 h after dark 8.408584999999999 8.04787 8.7693 12 h after dark 8.90918 8.8177 9.00066