Schweizer Licht Gesellschaft SLGOur purpose Light is the source of life. In addition to the sensory perception of over 90% through our eyes, light also influences us in terms of well-being, health, performance and safety. SLG stands for the professional examination and understanding of the complexity of the phenomenon of light. Our main activities organising national and international conferences Processing and condensing current information for the attention of members, other professional organisations and the public. organising training and further education events Drawing up and updating Swiss and European standards and guidelines for indoor and outdoor lighting. Participation in energy promotion programmes of the Swiss government and cooperation with other professional associations and organisations.