condition	mean	min	max
4 h after light	6.80176	6.69526	6.95268
8 h after light	6.683726666666666	6.652089999999999	6.70835
12 h after light	6.613996666666666	6.582269999999999	6.657089999999999
4 h after dark	6.464916666666666	6.36414	6.663860000000001
8 h after dark	6.489203333333333	6.26829	6.6463600000000005
12 h after dark	6.60015	6.552219999999999	6.6334100000000005