The increased popularity and a widespread application of LED devices require new ways of their certification. Technical data should be reliable, accurate and, more importantly, reproducible. Therefore a number of measuring systems are tested at the department of Photonics at Technical University of Denmark. The unique and innovative system of LabSpion – a good example of a type C horizontal photogoniometer – is utilised to test a new international standard of light measurements – CIE S 025/E:2015. Senior scientist Carsten Dam-Hansen reveals more details in the video.