condition mean min max 4 h after light 37.1115 35.8172 38.4058 8 h after light 40.1834 39.1785 41.1883 12 h after light 47.511399999999995 46.8741 48.1487 4 h after dark 66.30575 65.4525 67.159 8 h after dark 48.312 44.9201 51.7039 12 h after dark 45.69585 42.3381 49.0536