condition	mean	min	max
4 h after light	8.958933333333334	8.710360000000001	9.13592
8 h after light	8.91998	8.77365	9.04631
12 h after light	9.05862	8.90577	9.15893
4 h after dark	9.131366666666667	8.98452	9.23327
8 h after dark	9.01969	8.906360000000001	9.17583
12 h after dark	9.052923333333334	8.8785	9.15865