A rain gutter illumination system including an inverted U-shaped hanger, an illuminable surface attached to a stem of the hanger and including an aperture, an L-shaped base including a foot at one end, the end of the base opposite the foot being attached to the end of the illuminable surface opposite the hanger. A light source and one of various removable decorative inserts and optionally a diffusing panel are arranged so that the light source projects light through the aperture of the illuminable surface.