condition	mean	min	max
4 h after light	8.863539999999999	8.561739999999999	9.082419999999999
8 h after light	9.023243333333333	8.967039999999999	9.06894
12 h after light	9.31327	9.14606	9.49201
4 h after dark	9.44191	9.31777	9.560210000000001
8 h after dark	9.28924	9.08147	9.39534
12 h after dark	9.098906666666666	8.9984	9.28045