condition mean min max 4 h after light 18.4252 18.2852 18.5652 8 h after light 13.1941 13.0409 13.3473 12 h after light 14.1784 12.7239 15.6329 4 h after dark 18.73095 18.716 18.7459 8 h after dark 20.882649999999998 20.2548 21.5105 12 h after dark 20.6725 20.3505 20.9945