condition	mean	min	max
4 h after light	7.029363333333333	6.92692	7.11538
8 h after light	7.03169	6.887760000000001	7.1425
12 h after light	6.85514	6.73842	6.962039999999999
4 h after dark	7.05774	6.88139	7.178210000000001
8 h after dark	7.027303333333333	6.9501	7.174510000000001
12 h after dark	6.930636666666667	6.89497	6.963189999999999