condition	mean	min	max
4 h after light	6.85791	6.31603	7.39979
8 h after light	8.004155	7.86201	8.1463
12 h after light	7.14299	6.46631	7.81967
4 h after dark	8.715723333333333	8.23554	9.0126
8 h after dark	7.932543333333333	7.55151	8.5429
12 h after dark	8.611253333333334	6.82245	9.92791