condition	mean	min	max
4 h after light	8.32971	8.279	8.40982
8 h after light	9.56724	9.50663	9.62536
12 h after light	8.997853333333333	8.806410000000001	9.15248
4 h after dark	8.209183333333334	7.961110000000001	8.37695
8 h after dark	7.861713333333333	7.735710000000001	8.09385
12 h after dark	6.56152	6.4863599999999995	6.642639999999999