condition mean min max 4 h after light 107.3 107.3 107.3 8 h after light 83.0 82.0 84.0 12 h after light 61.2 47.6 74.8 4 h after dark 112.5 89.8 135.2 8 h after dark 103.25 80.8 125.7 12 h after dark 80.4 74.1 86.7