condition	mean	min	max
4 h after light	6.109043333333333	6.0239	6.19653
8 h after light	6.245563333333333	6.21924	6.27537
12 h after light	6.26444	6.14607	6.38507
4 h after dark	6.27122	6.019769999999999	6.43519
8 h after dark	6.161086666666667	5.87455	6.39999
12 h after dark	6.25156	6.12512	6.45717