The Parker Y-200 Yoke Light is a molded inspection light designed to fit the B-200 Contour Probe. The light produces substantial close-in illumination for magnetic testing. The light operates from the induction of the AC magnetic field produced by the yoke. A small coil wound within the molded light housing produces 12 volts AC which operates the small cylindrical shaped bulb. There are no wiring connections necessary for installation.