condition	mean	min	max
4 h after light	1600.05	1589.81	1610.29
8 h after light	1892.83	1808.17	1977.49
12 h after light	1677.185	1606.44	1747.93
4 h after dark	1189.02	1090.91	1287.13
8 h after dark	1372.995	1350.04	1395.95
12 h after dark	1383.325	1354.77	1411.88