condition	mean	min	max
4 h after light	7.873946666666666	7.785189999999999	7.940919999999999
8 h after light	7.880333333333334	7.777480000000001	7.96285
12 h after light	7.513756666666667	7.4988600000000005	7.5421
4 h after dark	6.8622499999999995	6.8325	6.8780399999999995
8 h after dark	7.1999933333333335	7.05629	7.2846
12 h after dark	7.92647	7.77769	8.04924