J.LUMI YCA1031 Through-hole mount dusk-to-dawn photo control ideal for residential outside wall lights, wall scones installed on your exterior walls or patio. This set comes with our popular YCA1030 button photocell with an aluminum wall plate. The sensor by itself is able to be mounted into standard outlet box, post lamp pole and wall pack fixtures. Thermal sensor eliminates the load temporarily switching off due to car headlights, lightning or another temporary light source. Locking nut and washer gasket help keep moisture from penetrating photo control device. The metal wall plate has 5/8 In. through-hole for proper mounting and wires should mount down when properly installed.