condition mean min max 4 h after light 3.9 3.9 3.9 8 h after light 20.950000000000003 20.8 21.1 12 h after light 14.95 8.6 21.3 4 h after dark 28.8 22.5 35.1 8 h after dark 9.6 8.6 10.6 12 h after dark 9.8 9.7 9.9