condition mean min max 4 h after light 1.875745 1.67869 2.0728 8 h after light 0.4759455 0.458528 0.493363 12 h after light 3.4436150000000003 3.28805 3.59918 4 h after dark 7.4532066666666665 7.22512 7.72362 8 h after dark 5.2428300000000005 5.15925 5.33307 12 h after dark 2.91363 2.62491 3.37718