. "Generally, moldable materials are used to form light transmissive substrate 14 and include, for example, plastics such as polyethylene terephthalate (PET), especially PET type G, polycarbonate, acrylics such as polyacrylates including polymethyl methacrylate (PMMA), polyacrylonitrile, polyvinyl chloride, polystyrene, polypropylene, polynaphthalene terephthalate (PNT), mixtures or copolymers thereo" . . . .