condition	mean	min	max
4 h after light	8.6279	8.5632	8.67963
8 h after light	8.641683333333333	8.491439999999999	8.72679
12 h after light	8.47003	8.21195	8.633289999999999
4 h after dark	8.87491	8.7985	8.93474
8 h after dark	8.894756666666666	8.67114	9.11232
12 h after dark	9.126583333333333	9.036769999999999	9.22079