An apparatus disposed along and attached to a wall edge to mitigate wind-generated vortices and suction loads on the wall, suitable and convenient for both new constructions and retrofits of existing buildings. The main body has an axial end for connecting a light emitting element and another axial end having an electrically conductive module, and the switch device is installed in the main body, and the switch device and the electrically conductive module jointly control the light emitting element to be turned on or off. Subsequent heating, forming and cooling processes of the metal workpiece are carried out in a controlled manner by a central synchronization unit.