condition	mean	min	max
4 h after light	9.053991	8.952622	9.15536
8 h after light	8.289287	7.820455	8.758119
12 h after light	8.064507	8.064507	8.064507
4 h after dark	8.940493	8.446746	9.43424
8 h after dark	7.7290175	7.436605	8.02143
12 h after dark	7.374922	7.374922	7.374922