condition mean min max 4 h after light 10.2 10.2 10.2 8 h after light 39.9 28.2 51.6 12 h after light 58.65 45.5 71.8 4 h after dark 40.95 3.9 78.0 8 h after dark 24.3 12.0 36.6 12 h after dark 19.15 13.7 24.6