condition	mean	min	max
4 h after light	7.35884	6.52441	7.793589999999999
8 h after light	7.5941133333333335	7.30737	7.757210000000001
12 h after light	7.532970000000001	7.24418	7.7967
4 h after dark	8.88607	8.7961	9.01816
8 h after dark	8.65435	8.342880000000001	8.82853
12 h after dark	8.93796	8.59657	9.27608