condition	mean	min	max
4 h after light	6.54607	6.2522400000000005	6.942060000000001
8 h after light	6.301163333333333	6.18369	6.51624
12 h after light	6.332413333333333	6.17735	6.454219999999999
4 h after dark	6.351966666666666	6.211469999999999	6.42721
8 h after dark	6.392483333333334	6.30251	6.51773
12 h after dark	6.56975	6.35426	6.9847600000000005