condition	mean	min	max
4 h after light	7.63773	7.487360000000001	7.763210000000001
8 h after light	7.84544	7.59001	8.07377
12 h after light	7.875426666666667	7.63315	8.11486
4 h after dark	8.039333333333333	7.682919999999999	8.24906
8 h after dark	8.181373333333333	7.93427	8.31829
12 h after dark	8.22818	8.03196	8.399989999999999