Dieter Lang is responsible for Human Centric Lighting with respect to development and applications in the R&D team of LEDVANCE. His focus is on everything related to the effects of light on human beings, which includes products, specifications, studies, standards, research, development, applications, and much more. He is active in different standardization organizations being convenor of the DIN standards committee FNL 27 and member of CIE JTC-9. He is member of the working group HCL in LightingEurope and chair of the expert committee HCL in the German ZVEI. He is member of the professional organizations LiTG (Lighting Technology Society in Germany) and the Human Centric Lighting Society in the US. His vision is that in the future artificial and natural lighting will be combined in a way that humans receive the best support for their everyday needs with respect to light. At the end all lighting affecting humans will follow the concepts of human centric lighting.