The power module of the LED wall washer is installed inside the casing, and the space is limited. Some manufacturers can solder the surface of the pin-type component to the PCB in order to save space. This is unacceptable. These surface-welded pin-type components are likely to fall off due to soldering or the like, posing a hazard. Therefore, it is necessary to adopt a jack welding method for these components. If the surface welding method has to be used, it is necessary to provide additional protection for the component by means of glue fixing.