condition mean min max 4 h after light 1595.403364 1427.497748 1763.30898 8 h after light 1591.512764 1558.208381 1624.817147 12 h after light 1672.9843685 1537.587658 1808.381079 4 h after dark 1991.565577 1731.895383 2251.235771 8 h after dark 2165.633688 1920.380538 2410.886838 12 h after dark 1094.867473 1094.867473 1094.867473