condition mean min max 4 h after light 9.558446666666667 9.37507 9.82367 8 h after light 10.056096666666667 9.91025 10.20285 12 h after light 10.488389999999999 10.28957 10.82504 4 h after dark 10.054556666666667 9.89545 10.23147 8 h after dark 9.84588 9.70546 10.02385 12 h after dark 9.81286 9.63835 10.069510000000001