condition	mean	min	max
4 h after light	6.2128000000000005	6.16099	6.275980000000001
8 h after light	6.21938	6.165780000000001	6.31194
12 h after light	6.223676666666666	6.11419	6.42747
4 h after dark	6.2095	6.15111	6.24695
8 h after dark	6.23816	6.16094	6.36285
12 h after dark	6.182196666666667	6.1264	6.29356