A vehicle lamp assembly includes a light source unit (e.g., one or more LEDs) mounted to an associated vehicle for providing illumination and a heat sink thermally coupled to the light source unit for dissipating generated heat therefrom. The heat sink has a main body portion, spaced apart fins extending from the main body portion, and an angled surface section on the main body portion disposed between adjacent ones of the spaced apart fins for urging environmental elements to run off the heat sink.