condition	mean	min	max
4 h after light	8.6242515	8.329509	8.918994
8 h after light	8.972151	8.630648	9.313654
12 h after light	8.755158999999999	8.698769	8.811549
4 h after dark	7.458317	7.270492	7.646142
8 h after dark	7.878710999999999	7.292478	8.464944
12 h after dark	8.646226	8.646226	8.646226