condition	mean	min	max
4 h after light	8.57241	8.518939999999999	8.63297
8 h after light	8.94024	8.87106	9.05522
12 h after light	8.977833333333333	8.93309	9.02346
4 h after dark	9.289343333333333	9.24465	9.35259
8 h after dark	9.070216666666667	9.00965	9.15104
12 h after dark	8.88929	8.82912	8.92401