condition	mean	min	max
4 h after light	6.080533333333333	5.90521	6.1971300000000005
8 h after light	6.30454	6.26232	6.34619
12 h after light	6.21433	6.11228	6.31907
4 h after dark	6.09415	5.96582	6.17694
8 h after dark	6.047013333333333	5.9833099999999995	6.094119999999999
12 h after dark	6.211336666666667	6.025180000000001	6.34129