condition mean min max 4 h after light 2010.8 2010.8 2010.8 8 h after light 1618.9 1585.4 1652.4 12 h after light 1760.35 1395.6 2125.1 4 h after dark 1808.4 1634.4 1982.4 8 h after dark 1671.25 1343.5 1999.0 12 h after dark 2015.6 1803.6 2227.6