A vehicle is provided that includes an external body panel that includes a license plate positioned on the external body panel. A lighting assembly is disposed on the vehicle and a detectable layer is disposed on at least one of the license plate and the lighting assembly. The detectable layer is configured to reflect at least one band of the electromagnetic spectrum.

A vehicle is provided that includes an external body panel that includes a license plate positioned on the external body panel. A lighting assembly is disposed on the vehicle and a detectable layer is disposed on at least one of the license plate and the lighting assembly. The detectable layer is configured to reflect at least one band of the electromagnetic spectrum.

A vehicle applique is provided that includes a decorative layer and an over-mold positioned over the decorative layer. The over-mold is substantially transparent. A semiconductor layer is positioned on an opposite side of the decorative layer from the over-mold. The semiconductor layer is configured to emit light through the decorative layer.

A vehicle applique is provided that includes a decorative layer and an over-mold positioned over the decorative layer. The over-mold is substantially transparent. A semiconductor layer is positioned on an opposite side of the decorative layer from the over-mold. The semiconductor layer is configured to emit light through the decorative layer.

An exemplary embodiment provides for a source of white light having at least one white light emitting device composed of a transparent glass/quartz chamber, a vacuum chamber including an optically active element, a spacer, a focusing lens, an IR laser diode, where the optically active element arranged in the vacuum chamber is a thin-layer oxide matrix doped with rare earth ions selected from the group of Nd, Yb, the concentration of dopant ions being in the range of 0.0001 to 100 at %.

A keycap assembly can include a keycap that includes a chargeable light emissive material. The keycap assembly can include a light sensor configured to sense light emitted by or incident to the chargeable light emissive material. The keycap assembly can further include a microcontroller. In certain implementations, the microcontroller includes a processor and a memory device storing instructions that, when executed by the processor, cause the microcontroller to: receive an electrical signal from the light sensor; and determine a property of the chargeable light emissive material based on the electrical signal, where the property includes at least one of a charge level or an illumination intensity.