A light assembly includes a housing adapted for mounting on a vehicle, wherein the housing includes a brake light input coupled to the light source and a marker light input coupled to the light source. An electrical circuit is configured to energize the light source at a brightness suitable for an identification lamp when at least one headlight of the vehicle is illuminated and also is configured to energize the light source at a brightness suitable for a stop lamp when the vehicle brake is applied, whether or not the identification lamp is energized. In this configuration, the can function as an identification light and as a center high mount stop light (CHMSL).