La Lumière
1960
By 1960 Lahner was pushing toward fully non-representational art. In this painting, titled La Lumière, the focal point at the upper center is a yellow disc that represents the sun. As colors recede, they diminish in intensity according to their relation to their distance from the sun's warmth. This stage of his work, and subsequent compositions, shows the artist moving away from illusionism.

Formes Et Couleurs
1960
Lahner preferred to work in complete solitude. Even a sitter posing quietly seemed to break his concentration. Perhaps this led to the evolution of his abstract style in the early 1950's. Here in Formes et couleurs, Lahner concentrates on relationships between the individual elements by grouping four figures that only casually resemble human beings.

Couleurs Et Lumieres
1974
In this series, among his last works completed, Lahner seems to have synthesized his early Impressionist style of landscapes with its softer color palette and Cubist illusion of space, with the bolder, flat colors influenced by stained glass and his forays into primitive imagery.