condition	mean	min	max
4 h after light	9.00636	8.2219	9.79082
8 h after light	7.66985	6.76215	8.57755
12 h after light	8.489005	8.16342	8.81459
4 h after dark	11.62555	10.8963	12.3548
8 h after dark	10.91905	10.4609	11.3772
12 h after dark	10.692	10.2206	11.1634