condition mean min max 4 h after light 1698.6 1698.6 1698.6 8 h after light 1675.2 1593.5 1756.9 12 h after light 1885.65 1796.9 1974.4 4 h after dark 1670.65 1294.0 2047.3 8 h after dark 1358.1 1133.5 1582.7 12 h after dark 1395.1 1246.6 1543.6