condition mean min max 0 h after light 7.565625000000001 7.36279 7.76846 4 h after light 7.118595 5.40691 8.83028 8 h after light 4.34344 3.72146 4.96542 4 h after dark 8.32549 6.71302 9.93796 8 h after dark 9.14558 8.74032 9.55084 12 h after dark 10.18979 8.72138 11.6582