condition	mean	min	max
4 h after light	7.8437	7.6002	8.02158
8 h after light	7.88863	7.415369999999999	8.22672
12 h after light	8.030276666666667	7.72992	8.28041
4 h after dark	7.987006666666667	7.55955	8.207880000000001
8 h after dark	8.080463333333332	7.781510000000001	8.275039999999999
12 h after dark	8.175643333333333	7.830089999999999	8.36432