condition	mean	min	max
4 h after light	7.3304133333333334	7.2232199999999995	7.41454
8 h after light	7.51992	7.40263	7.597360000000001
12 h after light	7.42626	7.38908	7.4536
4 h after dark	7.47541	7.390210000000001	7.58096
8 h after dark	7.558556666666667	7.48948	7.679189999999999
12 h after dark	7.65616	7.4022	7.94412