condition	mean	min	max
4 h after light	6.82354	6.710610000000001	7.000780000000001
8 h after light	6.8236	6.7057199999999995	6.8842
12 h after light	6.889273333333334	6.768089999999999	7.01095
4 h after dark	7.0736799999999995	6.752339999999999	7.419339999999999
8 h after dark	7.042273333333333	6.85245	7.38703
12 h after dark	6.885230000000001	6.64085	7.0381800000000005