condition	mean	min	max
4 h after light	3.9503366666666664	3.8340199999999998	4.12134
8 h after light	3.78506	3.6926900000000002	3.84363
12 h after light	3.9789966666666667	3.9447699999999997	4.01947
4 h after dark	3.8318833333333333	3.81901	3.85121
8 h after dark	3.82005	3.7488300000000003	3.8814
12 h after dark	3.71476	3.58143	3.9014800000000003