condition mean min max 4 h after light 2.3 2.3 2.3 8 h after light 56.05 49.4 62.7 12 h after light 32.7 10.4 55.0 4 h after dark 18.25 9.3 27.2 8 h after dark 66.9 46.6 87.2 12 h after dark 5.95 3.5 8.4