condition mean min max 4 h after light 10.4 10.4 10.4 8 h after light 55.95 51.2 60.7 12 h after light 47.65 31.4 63.9 4 h after dark 49.5 35.4 63.6 8 h after dark 69.55 62.1 77.0 12 h after dark 56.65 47.0 66.3