condition	mean	min	max
4 h after light	8.12258	8.054219999999999	8.176039999999999
8 h after light	8.39706	8.29304	8.56742
12 h after light	8.290046666666667	8.102210000000001	8.52149
4 h after dark	8.591006666666667	8.40618	8.71826
8 h after dark	8.314803333333334	8.13071	8.44937
12 h after dark	8.483043333333333	8.36583	8.56006