condition	mean	min	max
4 h after light	7.159285000000001	6.7754	7.54317
8 h after light	7.1903500000000005	6.73061	7.65009
12 h after light	6.385854999999999	6.17125	6.60046
4 h after dark	8.2697	7.90973	8.62967
8 h after dark	8.47081	8.15194	8.78968
12 h after dark	8.167605	8.09919	8.23602