condition	mean	min	max
4 h after light	8.82762	8.76061	8.90428
8 h after light	8.742623333333333	8.66605	8.88193
12 h after light	8.514240000000001	8.36992	8.58723
4 h after dark	8.416303333333333	8.090119999999999	8.814960000000001
8 h after dark	8.48026	8.279530000000001	8.844389999999999
12 h after dark	8.804656666666666	8.72823	8.93341