condition mean min max 4 h after light 1430.0 1430.0 1430.0 8 h after light 1372.4 1320.4 1424.4 12 h after light 1486.8 1352.1 1621.5 4 h after dark 1468.9 1395.9 1541.9 8 h after dark 1537.5 1487.6 1587.4 12 h after dark 1642.0 1568.4 1715.6