condition	mean	min	max
4 h after light	8.88405	8.613660000000001	9.04298
8 h after light	9.001	8.72677	9.19413
12 h after light	8.966643333333334	8.79773	9.11927
4 h after dark	8.937553333333334	8.58249	9.18447
8 h after dark	8.912903333333334	8.62187	9.083960000000001
12 h after dark	8.97523	8.73076	9.11003