condition mean min max 4 h after light 9.505735 8.91317 10.0983 8 h after light 10.4003 10.1931 10.6075 12 h after light 11.39635 11.1737 11.619 4 h after dark 15.022400000000001 14.9384 15.1064 8 h after dark 13.3256 13.292 13.3592 12 h after dark 13.549 13.52 13.578