condition	mean	min	max
4 h after light	7.15778	7.090139999999999	7.2511
8 h after light	7.2103866666666665	6.95792	7.47439
12 h after light	6.984006666666667	6.94425	7.04553
4 h after dark	7.146256666666666	7.053889999999999	7.25558
8 h after dark	7.292280000000001	7.0301800000000005	7.547680000000001
12 h after dark	7.247156666666666	7.13841	7.35929