condition	mean	min	max
4 h after light	3.720825	3.0477	4.39395
8 h after light	3.49826	3.33286	3.66366
12 h after light	5.327195	4.87133	5.78306
4 h after dark	8.74248	7.52319	9.96177
8 h after dark	8.71497	8.4866	8.94334
12 h after dark	7.100265	6.84421	7.35632