condition mean min max 2 h after light 3.8913083333333334 2.84491 5.25119 6 h after light 4.28613 2.37393 5.58618 10 h after light 4.628446666666667 2.3146 6.97964 14 h after light 4.700655 3.40219 5.83503 18 h after light 4.31539 3.11664 6.05827 2 h after dark 3.839875 2.21248 5.60802