condition	mean	min	max
4 h after light	8.70469	8.64891	8.78929
8 h after light	8.974293333333334	8.89955	9.10362
12 h after light	8.659783333333333	8.562439999999999	8.76673
4 h after dark	8.48859	8.381680000000001	8.628730000000001
8 h after dark	8.486369999999999	8.39823	8.57092
12 h after dark	8.01226	7.94866	8.13813