condition mean min max 4 h after light 148.3 148.3 148.3 8 h after light 165.25 139.8 190.7 12 h after light 121.35 104.8 137.9 4 h after dark 100.0 95.4 104.6 8 h after dark 149.05 119.9 178.2 12 h after dark 106.35 99.7 113.0