A music composer must know the instruments but not necessarily master all of them. The main point is that he can focus on each instrument with a general view. The process is the same for the designer when he imagines an idea, a concept or a global view. Over the years, Bruno Houssin has gained invaluable experience in lighting systems and furniture. All his products are designed with architects needs in mind. He has come to attach more and more attention to the environmental dimension in design and has developed his own eco-design. He headed the Paris-based Agence Zebulon which he founded 15 years ago. >french