condition	mean	min	max
4 h after light	6.169723333333334	6.09652	6.2127
8 h after light	6.06736	6.02623	6.1074
12 h after light	6.11285	6.04726	6.195819999999999
4 h after dark	6.117430000000001	5.97445	6.1973
8 h after dark	6.15185	5.9756	6.32757
12 h after dark	6.029436666666667	5.9818	6.0942300000000005