  We achieve a bosonization of one-dimensional ideal gas of exclusion
statistics $\lambda$ at low temperatures, resulting in a new variant of $c=1$
conformal field theory with compactified radius $R=\sqrt{1/\lambda}$. These
ideal excluson gases exactly reproduce the low-$T$ critical properties of
Luttinger liquids, so they can be used to characterize the fixed points of the
latter. Generalized ideal gases with mutual statistics and non-ideal gases with
Luttinger-type interactions have also similar behavior, controlled by an
effective statistics varying in a fixed-point line.
