Light at Night Study 2 (IMAGE) University of Colorado at Boulder Caption CU Boulder researcher Lameese Akacem takes a melatonin sample from preschooler Lauren Meier after exposing her to bright light before bedtime. 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.