A Drop of Water Can Light up 100 Small Led Bulbs (video) City University of Hong Kong Share Print E-Mail Loading video... Caption With the new droplet-based electricity generator, a drop of water released from a height of 15 cm can generate a voltage of over 140V, lighting up 100 small LED bulbs. Credit City University of Hong Kong / Nature Usage Restrictions The video can only be used with appropriate caption and credit. Share Print E-Mail 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.