The Benefit of Light (IMAGE) Ecole Polytechnique Fédérale de Lausanne Caption Under the effect of light, the system produces twice as much power as it does in the dark. Credit EPFL 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.