Preschoolers and Light at Night (VIDEO) University of Colorado at Boulder This video is under embargo. Please login to access this video. Caption New research from University of Colorado Boulder examines how bright nighttime light through the immature lens of a preschooler's eye nearly shuts down production of sleep-inducing melatonin. Credit University of Colorado Boulder 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.