condition	mean	min	max
4 h after light	7.641424000000001	7.350938	7.93191
8 h after light	8.282811500000001	7.991762	8.573861
12 h after light	7.471891	7.011872	7.93191
4 h after dark	7.709035	7.089213	8.328857
8 h after dark	8.556620500000001	7.742405	9.370836
12 h after dark	8.282312	8.282312	8.282312