An apparatus includes an auxiliary light includes a housing defining a front opening, a light emitting in the housing, and a transparent cover is mounted over the front opening. A plurality of fins are mounted to the housing and extend rearwardly from the front opening. The housing defines a cavity of non-rectangular shape from the opening to a backwall of the cavity. A circuit board has a perimeter conforming to the non-rectangular shape. The circuit board may include cutouts for a plug through the backwall. A heat conducting pad, such as graphite is interposed between the circuit board and the backwall and may likewise conform to the non-rectangular shape.