Lilas by Houbigant is a Floral fragrance for women. Lilas was launched in 1925. The fragrance features Lilac. Lilas by Houbigant is a floral fragrance for women, released in 1925. As the name suggests, it is associated with a lilac theme, reflecting the classic floral style of its era. Reports describe its projection and longevity as above average for its type. The fragrance has since been discontinued, and information about its exact composition and perfumer is limited.