condition	mean	min	max
4 h after light	6.227086666666667	6.12482	6.2794300000000005
8 h after light	6.26907	6.2336800000000006	6.3083800000000005
12 h after light	6.2945	6.28739	6.3026800000000005
4 h after dark	6.31423	6.21558	6.42588
8 h after dark	6.237543333333334	6.04711	6.4221900000000005
12 h after dark	6.362366666666667	6.24887	6.540690000000001