condition	mean	min	max
4 h after light	7.987723333333333	7.890510000000001	8.09577
8 h after light	7.886293333333334	7.76007	8.01961
12 h after light	7.8316	7.696039999999999	8.00198
4 h after dark	7.81097	7.624680000000001	7.912560000000001
8 h after dark	7.8446533333333335	7.79723	7.912669999999999
12 h after dark	7.862046666666666	7.794789999999999	7.99626