condition mean min max 4 h after light 2.98742 2.67712 3.29772 8 h after light 3.01907 2.33668 3.70146 12 h after light 2.586585 2.34149 2.83168 4 h after dark 4.85187 3.77254 5.8079 8 h after dark 2.7890466666666667 2.34766 3.58692 12 h after dark 3.0988933333333333 1.98677 3.75674