A sales or test display, assembled or in a kit, comprising, in the assembled state, a lower level intended to receive products, a lighting system suitable for illuminating the products from above, and an upper level on which the lighting system is fastened, the lighting system comprising: - at least one base, - at least one printed circuit board fastened on the base and including at least one light-emitting diode suitable for emitting a light, and - a guide made from a translucent material extending from the base along a line, the guide being located opposite the light-emitting diode along the line to collect and conduct said light, the guide comprising: - an upper surface suitable for downwardly reflecting at least part of the light located inside the guide and forming a reflected light, and - a lower surface suitable for allowing at least part of the reflected light to pass and forming a diffused light, the guide being configured to form an illuminated zone on the lower level, characterized in that the printed circuit is movable relative to the base between a disassembled position, in which the printed circuit board is separated from the base, and an assembled position, in which the printed circuit board is fastened on the base, the printed circuit board comprising a first plate on which the light-emitting diode is fastened, and the base comprises a second plate extending in a plane perpendicular to the line and parallel to the first plate in the assembled position, and a first pin and a second pin protruding from the first plate along the line and located on the other side of the second plate relative to the guide along the line, the first pin and the second pin being suitable for being received in the assembled position respectively in a first notch and a second notch defined by a peripheral edge of the first plate. - at least one base, - at least one printed circuit board fastened on the base and including at least one light-emitting diode suitable for emitting a light, and - a guide made from a translucent material extending from the base along a line, the guide being located opposite the light-emitting diode along the line to collect and conduct said light, the guide comprising: - an upper surface suitable for downwardly reflecting at least part of the light located inside the guide and forming a reflected light, and - a lower surface suitable for allowing at least part of the reflected light to pass and forming a diffused light, the guide being configured to form an illuminated zone on the lower level, - an upper surface suitable for downwardly reflecting at least part of the light located inside the guide and forming a reflected light, and - a lower surface suitable for allowing at least part of the reflected light to pass and forming a diffused light, the guide being configured to form an illuminated zone on the lower level, characterized in that the printed circuit is movable relative to the base between a disassembled position, in which the printed circuit board is separated from the base, and an assembled position, in which the printed circuit board is fastened on the base, the printed circuit board comprising a first plate on which the light-emitting diode is fastened, and the base comprises a second plate extending in a plane perpendicular to the line and parallel to the first plate in the assembled position, and a first pin and a second pin protruding from the first plate along the line and located on the other side of the second plate relative to the guide along the line, the first pin and the second pin being suitable for being received in the assembled position respectively in a first notch and a second notch defined by a peripheral edge of the first plate.