condition mean min max 4 h after light 10.64068 9.33075 11.95061 8 h after light 8.234324 7.945902 8.522746 12 h after light 9.1783865 9.026023 9.33075 4 h after dark 9.8269965 9.33075 10.323243 8 h after dark 9.666097 9.443609 9.888585 12 h after dark 9.707831 9.707831 9.707831