condition mean min max 3 h after light 3.1174333333333335 2.89467 3.37918 6 h after light 2.56089 2.48421 2.67406 9 h after light 3.37967 3.11908 3.56533 12 h after light 5.047695 4.48086 5.58075 3 h after dark 8.060026666666667 7.98877 8.15154 6 h after dark 8.407166666666667 7.69371 9.72529 9 h after dark 6.6296 6.33268 6.78912 12 h after dark 5.91202 5.31421 6.50983