condition	mean	min	max
4 h after light	6.098353333333334	5.96949	6.25734
8 h after light	6.396956666666667	6.14096	6.587260000000001
12 h after light	6.601623333333333	6.51047	6.67012
4 h after dark	6.439316666666667	6.35768	6.568039999999999
8 h after dark	6.23095	6.13255	6.40897
12 h after dark	5.90994	5.88109	5.96467