condition	mean	min	max
4 h after light	8.185203333333334	7.9779100000000005	8.446660000000001
8 h after light	8.20429	7.910639999999999	8.36053
12 h after light	8.492583333333332	8.22875	8.68245
4 h after dark	8.63138	8.14241	8.92632
8 h after dark	8.581753333333333	8.29526	8.843739999999999
12 h after dark	8.396556666666667	8.327760000000001	8.489310000000001