condition	mean	min	max
4 h after light	8.139205	7.48967	8.78874
8 h after light	2.42443	2.16342	2.68544
12 h after light	2.40082	1.96609	2.83555
4 h after dark	7.971005	7.94217	7.99984
8 h after dark	9.03902	8.11382	9.96422
12 h after dark	9.155125	8.75061	9.55964