condition mean min max 4 h after light 2804.9 2804.9 2804.9 8 h after light 2534.3 2043.4 3025.2 12 h after light 1575.9 1364.4 1787.4 4 h after dark 1340.1 1003.7 1676.5 8 h after dark 1334.1 1101.9 1566.3 12 h after dark 1234.7 1049.0 1420.4