condition	mean	min	max
4 h after light	6.967773333333334	6.929180000000001	7.03976
8 h after light	7.062243333333334	6.844760000000001	7.2282399999999996
12 h after light	7.11571	6.97859	7.203930000000001
4 h after dark	7.0809299999999995	6.95432	7.1505399999999995
8 h after dark	6.88955	6.794689999999999	7.0102899999999995
12 h after dark	6.709943333333333	6.624439999999999	6.81862