Abstract: An illumination device includes a first light source, a second light source, and a light-diffusing medium. The first light source emits light of a first hue, and the second light source emits light of a second hue. The light-diffusing medium receives light emitted from the first and second light sources. The light-diffusing medium is composed of a light-transmitting material and a light color-converting material. The light color-converting material is selected to convert the light of a first hue into a light of a third hue, and to pass the light of the second hue with substantially no conversion. The light-diffusing medium thus emits light of a perceived hue that is a combination of the light of the third hue and the light of the second hue. By adjusting the relative intensities of the light emitted by the first and second light sources, the perceived hue can be readily transformed or tuned.

Abstract: An illumination device for simulating neon lighting comprising a plurality of space point light sources positioned adjacent a lateral light receiving surface of a substantially rod-like waveguide made of a material that preferentially scatters light entering the light receiving surface such that the light intensity pattern exiting a lateral light emitting surface of the waveguide has a substantially uniform light intensity pattern.