condition mean min max 4 h after light 8.57826 4.69158 10.627 8 h after light 6.1994766666666665 1.88372 10.4984 12 h after light 7.03495 3.71185 11.0206 4 h after dark 7.698196666666667 4.7486 10.1881 8 h after dark 7.64339 5.23736 11.0723 12 h after dark 11.8256 10.1454 14.2581