condition	mean	min	max
4 h after light	6.020946666666667	5.9237400000000004	6.1004
8 h after light	6.207483333333333	6.151680000000001	6.29401
12 h after light	6.022306666666666	5.94726	6.1441
4 h after dark	5.98108	5.81913	6.29401
8 h after dark	5.89813	5.87078	5.91399
12 h after dark	5.85272	5.78437	5.89849