condition	mean	min	max
0 h after light	15.519465	9.56223	21.4767
4 h after light	5.37241	4.86292	5.8819
8 h after light	4.75587	2.42911	7.08263
4 h after dark	6.463555	3.51547	9.41164
8 h after dark	13.5731	12.9261	14.2201
12 h after dark	8.89769	3.49678	14.2986