condition mean min max 4 h after light 11.96768 9.97726 13.9581 8 h after light 9.401440000000001 8.89703 9.90585 12 h after light 6.99918 6.07791 7.92045 4 h after dark 9.824415 9.75086 9.89797 8 h after dark 8.72048 8.69619 8.74477 12 h after dark 9.654195 9.31607 9.99232