Evening Sky (image) University of Tennessee Institute of Agriculture Share Print E-Mail Caption Solar radiation data has been converted into new Daily Light Interval maps by University of Tennessee and Clemson researchers. Credit Photo by T. Salvador, courtesy UTIA. Usage Restrictions None 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.