condition	mean	min	max
4 h after light	1655.98	1615.59	1696.37
8 h after light	1416.835	1388.72	1444.95
12 h after light	1123.28	1119.73	1126.83
4 h after dark	1019.367	927.724	1111.01
8 h after dark	1472.295	1446.0	1498.59
12 h after dark	1640.065	1603.86	1676.27