condition mean min max 4 h after light 6.6 6.6 6.6 8 h after light 12.8 5.5 20.1 12 h after light 17.95 13.0 22.9 4 h after dark 20.0 4.9 35.1 8 h after dark 16.15 10.1 22.2 12 h after dark 19.849999999999998 6.4 33.3