condition	mean	min	max
4 h after light	9.932739999999999	9.02378	10.8417
8 h after light	8.57606	8.28146	8.87066
12 h after light	8.73679	8.05129	9.42229
4 h after dark	18.91395	18.1798	19.6481
8 h after dark	17.6754	17.3741	17.9767
12 h after dark	17.034750000000003	16.9523	17.1172