His technique evolved through direct contact with Camille Pissarro and Georges Seurat. Lebasque adopted the divisionist method of placing pure colours side by side to capture the effects of southern sunlight. His paintings often feature his wife and children in private moments, such as "Mevrouw Lebasque en haar dochtertje voor de piano". He avoided the harshness of traditional Fauvism by using pale shadows and subtle transitions. This approach allowed him to maintain a sense of calm while still using the bold palette of the Mediterranean coast.

Modern collectors value the sense of serenity found in Lebasque's depictions of the French Riviera and domestic interiors. His work offers a balance between the structure of Post-Impressionism and the expressive freedom of early twentieth-century art. Pieces like "The Bather" provide a window into a world of leisure and light without the visual agitation of more radical movements. His ability to translate the warmth of Saint-Tropez or Cannes into a domestic setting makes his prints a popular choice for contemporary homes.