condition	mean	min	max
4 h after light	6.24129	5.99949	6.4028
8 h after light	6.128253333333333	6.00371	6.20185
12 h after light	6.153989999999999	6.0421	6.229
4 h after dark	6.19665	6.15634	6.2678199999999995
8 h after dark	6.236883333333334	6.192080000000001	6.27894
12 h after dark	6.571023333333333	6.27516	6.7716199999999995