condition mean min max 4 h after light 112.9 112.9 112.9 8 h after light 115.35 115.0 115.7 12 h after light 107.9 101.8 114.0 4 h after dark 94.1 89.1 99.1 8 h after dark 105.85 102.1 109.6 12 h after dark 93.35 90.3 96.4