condition	mean	min	max
4 h after light	1930.4	1930.4	1930.4
8 h after light	1748.15	1701.0	1795.3
12 h after light	1342.5	1153.4	1531.6
4 h after dark	1570.65	1221.4	1919.9
8 h after dark	1660.65	1481.0	1840.3
12 h after dark	1726.85	1698.8	1754.9