Of all the colours on the designer’s palette, light is the by far the most important. Light communicates directly to the visitor; it signals the importance of the museum object; it concentrates the visitor’s attention on its qualities. It makes visible aspects that would otherwise be noted. Louis I. Kahn said that ‘shadow is only spent light’, and the intelligent control of light and shadow – focusing brings an object alive; dimming the background brings an object into relief; washing the walls for effect – is the heart of creating new value with the museum’s objects. The lighting designer is an artist who paints with light, at the service of the object and the museum visitor.