condition mean min max 4 h after light 107.8 107.8 107.8 8 h after light 94.85 85.2 104.5 12 h after light 90.3 81.6 99.0 4 h after dark 95.0 73.3 116.7 8 h after dark 108.7 92.5 124.9 12 h after dark 135.6 125.0 146.2