condition	mean	min	max
4 h after light	8.564023333333333	8.37148	8.81524
8 h after light	9.071683333333333	8.95394	9.24204
12 h after light	9.074413333333332	9.009160000000001	9.121889999999999
4 h after dark	9.219413333333334	9.0911	9.33956
8 h after dark	9.11666	8.84609	9.35871
12 h after dark	8.78835	8.49071	8.98927