condition mean min max 0 h after light 3.41226 3.32372 3.5008 4 h after light 2.47936 2.46032 2.4984 8 h after light 2.896255 2.1893 3.60321 4 h after dark 3.353215 2.90084 3.80559 8 h after dark 3.246265 2.88865 3.60388 12 h after dark 3.297785 2.97999 3.61558