condition	mean	min	max
4 h after light	6.455586666666667	6.30623	6.53394
8 h after light	6.4942166666666665	6.32876	6.65694
12 h after light	6.427866666666667	6.40435	6.47469
4 h after dark	6.47974	6.35441	6.5445400000000005
8 h after dark	6.44847	6.2801	6.5372900000000005
12 h after dark	6.40511	6.30757	6.47896