condition mean min max 4 h after light 109.6 109.6 109.6 8 h after light 84.2 60.4 108.0 12 h after light 87.8 87.1 88.5 4 h after dark 91.55 77.1 106.0 8 h after dark 96.8 94.5 99.1 12 h after dark 96.75 80.6 112.9