condition mean min max 4 h after light 981.9 981.9 981.9 8 h after light 1174.0 1049.4 1298.6 12 h after light 1756.1 1483.2 2029.0 4 h after dark 1636.85 1184.8 2088.9 8 h after dark 1481.5 1241.1 1721.9 12 h after dark 1102.2 890.5 1313.9