A light emitting device according to the embodiment includes a conductive support member; a light emitting structure on the conductive support member including a first conductive semiconductor layer, a second conductive semiconductor layer, and an active layer between the first and second semiconductor layers; and a protective device on the light emitting structure. For example, the PIC is a component in a wireless device that is used for quantum communications in a quantum communications system. The lower conductive segments are arranged in an open configuration, allowing adjacent unit circuits be accessed simultaneously. The reflective surface is visible from outside the case to increase visibility of product within the product display area. Also, a color resin layer is sandwiched between the signal electrodes and the common electrodes.