Abstract: Apparatus and method for illuminating plumbing fixtures such as spouts and controls and vessels that are fixed in place relative to a mounting surface. A light transmitting material is used for the fixture, and one or more hidden light sources are mounted inward of the mounting surface. The hidden light source may be attached or detached from the fixture and is arranged so that light from the hidden light source is received by an inward portion of the fixture, is transmitted through the fixture to its outward exposed surface, and then is emitted outward of the mounting surface. Thus the inventive fixture is illuminated from within.