'Speaking LED': The macro image of a high-performance LED and the visualization of the hierarchical nesting structure of thousands of files can be seen. The availability of data and its networking is crucial for effective production in industry. The LED light source shown by Lothar Stirnat is a transport point for data and information: in the visible wavelength range and in future also in the Li-Fi piggyback system. The modulated light waves propagate like waves in water.