condition mean min max 4 h after light 1758.0 1758.0 1758.0 8 h after light 1570.15 1542.9 1597.4 12 h after light 1461.6 1459.4 1463.8 4 h after dark 1826.0 1205.2 2446.8 8 h after dark 2038.95 1997.5 2080.4 12 h after dark 1907.65 1783.9 2031.4