condition	mean	min	max
4 h after light	8.790366666666666	8.68366	8.8448
8 h after light	9.036756666666667	8.87158	9.21805
12 h after light	9.278273333333333	9.032960000000001	9.57523
4 h after dark	8.849739999999999	8.58617	9.12553
8 h after dark	8.47184	8.19202	8.90211
12 h after dark	8.248423333333335	8.000760000000001	8.482280000000001