condition	mean	min	max
4 h after light	8.978965	8.60692	9.35101
8 h after light	13.0678	12.1268	14.0088
12 h after light	7.972805	7.89048	8.05513
4 h after dark	3.278426666666667	2.85824	3.69231
8 h after dark	4.87855	4.09144	5.56802
12 h after dark	4.876126666666667	4.45764	5.60672