condition mean min max 4 h after light 9.5024055 9.16895 9.835861 8 h after light 9.488163499999999 9.325712 9.650615 12 h after light 9.7103665 9.650615 9.770118 4 h after dark 8.355736 8.226945 8.484527 8 h after dark 10.8903045 10.391312 11.389297 12 h after dark 11.585534 11.585534 11.585534