condition mean min max 4 h after light 9.2 9.2 9.2 8 h after light 11.5 8.1 14.9 12 h after light 21.049999999999997 10.7 31.4 4 h after dark 19.9 8.5 31.3 8 h after dark 15.799999999999999 7.7 23.9 12 h after dark 18.85 7.4 30.3