condition	mean	min	max
4 h after light	17.461	16.2682	18.6538
8 h after light	3.9767150000000004	3.6907	4.26273
12 h after light	1.81448	1.60435	2.02461
4 h after dark	1.7472599999999998	1.70193	1.79259
8 h after dark	4.20692	3.96181	4.45203
12 h after dark	8.495165	8.32234	8.66799