Finger Light (IMAGE) Duke University Caption Two electronically active leads directly printed along the underside of Duke graduate student Nick Williams's pinky successfully light up an LED when a voltage is applied. Credit Nick Williams, Duke University 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.