condition mean min max 4 h after light 47.9 47.9 47.9 8 h after light 69.75 67.4 72.1 12 h after light 55.55 33.8 77.3 4 h after dark 45.1 10.4 79.8 8 h after dark 27.6 23.3 31.9 12 h after dark 33.7 33.3 34.1