condition mean min max 4 h after light 97.0971 76.533 117.888 8 h after light 52.8447 18.2784 82.4321 12 h after light 86.9251 52.5459 129.216 4 h after dark 120.3532 98.8946 133.362 8 h after dark 147.919 106.792 168.497 12 h after dark 133.167 131.648 134.198