condition mean min max 4 h after light 117.6 117.6 117.6 8 h after light 131.4 130.9 131.9 12 h after light 115.9 74.8 157.0 4 h after dark 81.85 46.6 117.1 8 h after dark 57.599999999999994 45.6 69.6 12 h after dark 89.25 86.6 91.9