condition mean min max 4 h after light 1421.0 1421.0 1421.0 8 h after light 1317.2 1253.5 1380.9 12 h after light 1389.4 1226.4 1552.4 4 h after dark 1534.9 1342.9 1726.9 8 h after dark 1547.8 1344.5 1751.1 12 h after dark 1618.25 1613.4 1623.1