condition mean min max 4 h after light 5.2 5.2 5.2 8 h after light 15.95 10.4 21.5 12 h after light 33.45 21.7 45.2 4 h after dark 8.1 7.6 8.6 8 h after dark 22.45 4.5 40.4 12 h after dark 27.5 4.1 50.9