condition mean min max 4 h after light 105.7 105.7 105.7 8 h after light 106.1 87.1 125.1 12 h after light 93.6 85.1 102.1 4 h after dark 90.5 82.8 98.2 8 h after dark 109.65 97.2 122.1 12 h after dark 135.4 102.4 168.4