condition	mean	min	max
4 h after light	8.20914	8.0949	8.33284
8 h after light	8.24814	8.11967	8.38234
12 h after light	8.233126666666667	7.89655	8.599969999999999
4 h after dark	8.363990000000001	8.16034	8.656830000000001
8 h after dark	8.274019999999998	8.115839999999999	8.50278
12 h after dark	8.23811	8.077060000000001	8.38791