condition	mean	min	max
4 h after light	8.62357	8.48404	8.77764
8 h after light	8.507926666666668	8.326310000000001	8.702760000000001
12 h after light	8.483983333333335	8.35604	8.582310000000001
4 h after dark	8.617073333333334	8.26859	8.87188
8 h after dark	8.641306666666667	8.46124	8.75463
12 h after dark	8.665280000000001	8.57888	8.77663