condition mean min max 4 h after light 1661.9 1661.9 1661.9 8 h after light 1552.7 1420.2 1685.2 12 h after light 1830.6 1438.1 2223.1 4 h after dark 1712.95 1437.9 1988.0 8 h after dark 1768.95 1475.6 2062.3 12 h after dark 2659.5 2093.3 3225.7