condition	mean	min	max
4 h after light	8.433	8.21503	8.6073
8 h after light	8.64915	8.37969	8.82063
12 h after light	8.975603333333334	8.74051	9.197339999999999
4 h after dark	8.772846666666666	8.59557	8.93469
8 h after dark	8.49324	8.22973	8.86875
12 h after dark	8.538763333333334	8.43961	8.609539999999999