Appartement Spectral is a minimalist house located in Paris, France, designed by Betillon / Dorval-Bory. In the project Spectral Apartment, the architects sought to explore features based on a bi-polar analysis of space. The project is a renovation of a small one-bedroom studio in the Paris suburbs. As the client was particularly concerned about the issue of lighting his apartment, on the first floor facing a courtyard, they have developed a reflection on the quality of artificial light.