| http://www.w3.org/ns/prov#value | - The light pipe 1704 may be made of a flexible material or a rigid material, such as a plastic, rubber, a crystal, PVC, glass, a polymer, a metal, an alloy or other material. [0241] Referring to FIG. 18, a color mixing system 1802 is provided for mixing color from a lighting unit 100.
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