condition	mean	min	max
4 h after light	6.87805	6.689539999999999	7.02225
8 h after light	6.703883333333334	6.47321	6.82653
12 h after light	7.327476666666667	7.06492	7.60965
4 h after dark	6.61027	6.46605	6.7862
8 h after dark	6.271756666666667	6.258380000000001	6.2926
12 h after dark	6.85042	6.74362	7.01072