Embodiments of the present invention are directed to systems, devices, and methods for displaying and securing articles of merchandise. In one example, a merchandise security system includes a plurality of security devices. Each of the security devices is configured to be attached to an article of merchandise and includes an illumination source for generating a light signal. The system also includes at least one computing device configured to communicate with the illumination sources in order to obtain data from the security devices and/or the articles of merchandise. Each of the security devices is configured to configured to generate a security signal in response to removal of the article of merchandise from the security device.