condition mean min max 4 h after light 3.5 3.5 3.5 8 h after light 15.899999999999999 15.4 16.4 12 h after light 21.849999999999998 9.9 33.8 4 h after dark 2.55 2.1 3.0 8 h after dark 7.95 1.5 14.4 12 h after dark 7.1 1.5 12.7