Dr. Günther Leschhorn received his PhD in Physics during his work with the Max-Planck Institute of Quantum Optics in Munich, Germany. He specialized in the field of single molecule spectroscopy and ultra-fast laser interaction. He was a member of the Munich-Centre of Advanced Photonics, a cluster of excellence of the German Research Foundation and holds a stipend of the International Max-Planck Research School of Advanced Photon Science. In 2011 he served as a post-doc at the University of Freiburg (Germany) and was heading a group interested in the field of quantum computation. He joined Instrument Systems as product manager for Spectrometers, Spectroradiometry and Solid-State Lighting in 2012. Today he is head of the product management department of Instrument Systems. Dr. Richard Young’s interest and contributions to light measurement span over 40 years. Dr. Young was educated in England, where he received a B.A. honours degree and Ph.D. in Chemistry. In 1983 he moved from academia to industry when joined Glen Creston Ltd. in London. In 1994 he relocated to the USA and joined Optronic Laboratories, Inc. where he was promoted to vice president at the end of 1994. In 2010 he joined Instrument Systems as Chief Scientist. He is an active member of many CIE technical committees and chairs committees on array spectroradiometers and on spectroradiometry. Richard Young recently retired from his role as Chief Scientist and is now working as a consultant for Instrument Systems.