condition	mean	min	max
4 h after light	6.03927	5.9474800000000005	6.15145
8 h after light	6.10849	6.04748	6.156219999999999
12 h after light	6.07379	5.87956	6.44166
4 h after dark	6.040403333333334	6.0169	6.06123
8 h after dark	6.079406666666666	5.96201	6.189369999999999
12 h after dark	6.162416666666667	5.94559	6.40059