condition	mean	min	max
4 h after light	7.83763	7.764289999999999	7.930739999999999
8 h after light	7.9647266666666665	7.762689999999999	8.06798
12 h after light	8.419533333333334	8.2764	8.52949
4 h after dark	8.20357	8.14589	8.25538
8 h after dark	8.083346666666667	7.910089999999999	8.2037
12 h after dark	7.844906666666667	7.6711	7.98728