This type of housing box has mainly a mechanic function, in order to allow a proper arrangement of the spotlight. The application of this accessory is recommended whereas it is not possibile to create holes with appropriate accuracy, such as in case of concrete, wall or ceiling masonry etc…For surfaces of easy processing, ex. Plasterboard, wood or plastic material, the housing box is not required, provided that the installer executes a hole with the same dimensions as the one indicated in the catalogue. The housing box is provided with two end caps in PVC. The one situated in the upper part has the function of protecting the inner part of the hole during the installation process and after that is removed, the one situated at the bottom, that the installer must properly perforate, is for eventually inserting the tube for the supply cable.