A wiring box is used for connecting an external wire to a driver circuit and for connecting the driver circuit to a lighting apparatus. The wiring box includes a container box and a foldable top cover. In some embodiments, it is preferable that the lighting apparatus have elongated shapes, like light tubes. The container box has a box opening. The foldable top cover includes a center plate and at least one lateral plate. The center plate is connected to the at least one lateral plate with an axial structure, the lateral plate is folded to align with the center plate in an elongated manner during shipping. The lateral plate is rotated with respect to the center plate along the axial structure to expand and to cover the box opening of the container box.