This document proposes a low-cost and noninvasive system to detect faulty streetlights using a device called the Hitchhiker that would be installed on vehicles to collect data on streetlight intensity. This data would be used to create illumination maps that could identify changes indicating faulty streetlights. Unlike adding sensors to each streetlight, this approach does not require modifying existing infrastructure and could identify faulty streetlights across a city inexpensively and complement the work of electrical inspectors.