condition mean min max 4 h after light 10.9862 10.6651 11.3073 8 h after light 9.283965 8.81839 9.74954 12 h after light 8.950165 8.31245 9.58788 4 h after dark 8.110005000000001 7.69097 8.52904 8 h after dark 9.42741 8.78682 10.068 12 h after dark 9.89949 9.76238 10.0366