condition	mean	min	max
4 h after light	6.47295	6.44219	6.4954
8 h after light	6.745793333333333	6.611960000000001	6.94108
12 h after light	6.68586	6.65877	6.731
4 h after dark	6.286083333333334	6.13099	6.4600800000000005
8 h after dark	6.275046666666666	6.2571	6.29927
12 h after dark	6.24637	6.199	6.31315