An integrated multilayer structure (100, 200, 300, 400, 600, 700), comprising a substrate film having a first side and an opposing second side electronics comprising at least one light source, optionally a LED (light-emitting diode), provided upon the first side of the substrate film and a number of electrical conductors, preferably printed electronics based electrical conductors, said electrical conductors at least electrically coupled to the at least one light source, the at least one light source being configured to emit light at least in selected one or more frequencies or wavelengths, optionally including visible light; an optically transmissive element comprising thermoplastic optically transmissive, having regard to the selected frequencies or wavelengths, material having a first refractive index, said optically transmissive element comprising the thermoplastic optically transmissive material molded onto the first side of the substrate film so as to at least partially embed the at least one light source therewithin; and optical cladding (106, 106a, 106b, 106d, 106e, 106f) comprising material having a lower refractive index than the first refractive index and provided on the first side of the substrate film and adjacent the optically transmissive element, wherein the at least one light source, the optically transmissive element and the optical cladding have been mutually configured (702, 704) so as to convey light emitted by the light source within the optically transmissive material of the optically transmissive element, at least portion of the conveyed light undergoing a substantially total internal reflection when incident upon the optical cladding, with the substrate film being thermoformed into a non-planar, three-dimensional target shape. electronics comprising at least one light source, optionally a LED (light-emitting diode), provided upon the first side of the substrate film and a number of electrical conductors, preferably printed electronics based electrical conductors, said electrical conductors at least electrically coupled to the at least one light source, the at least one light source being configured to emit light at least in selected one or more frequencies or wavelengths, optionally including visible light; an optically transmissive element comprising thermoplastic optically transmissive, having regard to the selected frequencies or wavelengths, material having a first refractive index, said optically transmissive element comprising the thermoplastic optically transmissive material molded onto the first side of the substrate film so as to at least partially embed the at least one light source therewithin; and optical cladding (106, 106a, 106b, 106d, 106e, 106f) comprising material having a lower refractive index than the first refractive index and provided on the first side of the substrate film and adjacent the optically transmissive element, wherein the at least one light source, the optically transmissive element and the optical cladding have been mutually configured (702, 704) so as to convey light emitted by the light source within the optically transmissive material of the optically transmissive element, at least portion of the conveyed light undergoing a substantially total internal reflection when incident upon the optical cladding, with the substrate film being thermoformed into a non-planar, three-dimensional target shape.