condition	mean	min	max
4 h after light	9.014036666666668	8.917060000000001	9.115969999999999
8 h after light	9.00409	8.9544	9.05766
12 h after light	8.861790000000001	8.736310000000001	8.92576
4 h after dark	9.02989	9.01336	9.06057
8 h after dark	9.016316666666667	8.9051	9.076410000000001
12 h after dark	9.01284	8.9047	9.07276