Train Station (IMAGE) Optica Caption In a public area, LEDs could be used for general lighting, visible light communication and 3D video surveillance. The illustration shows multiple access LiFi -- wireless communication technology that uses light to transmit data and position between devices -- and visible light positioning in a train station. Credit Emma Le Francois, University of Strathclyde Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.