condition mean min max 4 h after light 1768.098017 1673.676007 1862.520027 8 h after light 1939.5074525 1832.30898 2046.705925 12 h after light 2102.386377 1949.553627 2255.219127 4 h after dark 1871.64478 1685.389968 2057.899592 8 h after dark 2228.72927 2071.823072 2385.635468 12 h after dark 2215.215977 2215.215977 2215.215977