This light machine is an instrument where light, rather than sounds, are your tones. The performance is inside of the piano. While an acoustic piano spreads tones into its surroundings from within the piano case, the light piano collects natural light from its context into a chamber where darkness equates with silence. By opening and closing shutters in different orientations, one can experience light and darkness without being able to view the light source – only the light. Light is filtered through six identical modules each orientated in a different direction. The module pulls light down a shaft and reflects it on a surface. The six illuminated surfaces establish the inner walls of the cubic piano chamber. In a building scale the light piano is a pavilion or a hideout. You cannot view out and nobody can see you inside. The horizontal light shafts function as entrance. Due to the light pianos small size it is easily transportable. The light conditions in a variety of places can be investigated.