According to an exemplary embodiment, a dimmable circuit for operating a lighting fixture may be provided. The dimmable circuit may be capable of regulating the output intensity of a connected light source via the rotational angular displacement of an arm fixture. The dimmable circuit may include a housing, an arm fixture with at least one light source mounted thereto, a rotatable shaft that provides angular rotational movement of the arm fixture about the housing, an encoder, an electrical control unit, and a slip ring. The rotatable shaft may support multiple complete rotations of the arm fixture, as well as rotations below and beyond 360 degrees. Further, a programmable microprocessor may be used to manipulate various light characteristics of the light source according to predetermined dimming patterns.