condition mean min max 0 h after light 3.508915 3.3047 3.71313 4 h after light 2.15203 2.11055 2.19351 8 h after light 4.000505 3.82655 4.17446 4 h after dark 5.057525 4.76552 5.34953 8 h after dark 5.004545 4.26681 5.74228 12 h after dark 3.560785 3.52422 3.59735