condition mean min max 4 h after light 10.08789 5.36867 13.9659 8 h after light 7.376116666666666 2.81182 11.644 12 h after light 11.94614 6.94022 18.6774 4 h after dark 14.313633333333334 10.2062 16.5277 8 h after dark 18.1937 12.6956 21.5965 12 h after dark 18.53173333333333 17.2294 20.5765