condition mean min max 4 h after light 104.8 104.8 104.8 8 h after light 102.0 81.2 122.8 12 h after light 108.1 101.2 115.0 4 h after dark 90.8 77.0 104.6 8 h after dark 61.95 47.0 76.9 12 h after dark 74.35 68.8 79.9