condition	mean	min	max
4 h after light	6.91447	6.847689999999999	6.9694
8 h after light	7.008446666666667	6.75784	7.180460000000001
12 h after light	7.188503333333333	7.02583	7.41764
4 h after dark	6.941316666666666	6.69994	7.25576
8 h after dark	6.905083333333334	6.69033	7.01273
12 h after dark	6.749140000000001	6.68428	6.844710000000001