Coelux is an optical system based on nanotechnology to artificially reproduce the natural light and visual appearance of the sun and sky. Coelux offers a breakthrough opportunity for indoor architecture by creating the sensation of infinite space. Its mission is to foster an innovative solution for lighting, architecture, and real-estate industries by creating the perception of an extraordinarily wide space with a genuine physical reproduction of optical atmospheric phenomena indoors. Coelux’s unique lighting systems reproduce the true effect of natural sunlight entering through the opening in the integrated ceiling, with a realistic sun perceived at infinite distance surrounded by a clear deep blue sky. Objects shine in the exceptional light casting sharp sky-blue shadows that reproduce a virtual experience of the sun and sky. Coelux allows us to rediscover natural light in the real world in a totally new and surprising way.