A method and lighting andor controlling the turning on of a fixed luminous source able to emit light rays in an optical system of a lighting andor signaling module mounted movable in rotation between an active lighting andor signaling position and a rest position. The \u03c0 processing unit receives input of data in units of planes and outputs data in units of sheets. The cam follower carries a plunger arranged to move to engage the container 10 and discharge product therefrom.