The National Synchrotron Light Source II at Brookhaven National Laboratory in Upton, New York is a national user research facility funded primarily by the U.S. Department of Energy's Office of Science. NSLS-II is a synchrotron light source, designed to produce X-rays 10,000 times brighter than BNL's original light source, the National Synchrotron Lig…The National Synchrotron Light Source II at Brookhaven National Laboratory in Upton, New York is a national user research facility funded primarily by the U.S. Department of Energy's Office of Science. NSLS-II is a synchrotron light source, designed to produce X-rays 10,000 times brighter than BNL's original light source, the National Synchrotron Light Source. NSLS-II supports research in energy security, advanced materials synthesis and manufacturing, environment, and human health.