Excimer Lamp (IMAGE) Columbia University Irving Medical Center Caption An excimer lamp shines 207-nm UV light on MRSA bacteria in petri dish. Credit Dr. David Brenner, Columbia University Medical Center 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.