condition	mean	min	max
4 h after light	5.837765	4.1862	7.48933
8 h after light	4.509735	4.32947	4.69
12 h after light	4.267305	3.77748	4.75713
4 h after dark	8.614205	8.1205	9.10791
8 h after dark	7.36857	6.8844	7.85274
12 h after dark	8.27591	8.23337	8.31845