GLDF (Global Lighting Data Format)


The new, open, state-of-the-art product data format for luminaires and sensors marks a milestone that will help boost design competence within the industry while constituting a secure investment at the same time.


“the digital twin of real luminaires and sensors”


As the initiator of this vision, RELUX is working with DIAL to compile and maintain this data and geometry format. The two companies are offering all parties concerned who are interested a description of the format with sample files. Readers and editors will support the industry in compiling digital twins of this kind.


Why a uniform data format of this type?

  • For greater benefit for planners
    The various players in the planning process depend on having the right information for the tasks at hand. The information can be accessed in GLDF. The digital twin ensures better comparability and facilitates data handling.
  • For a reduced outlay in the industry
    A reduction in the outlay involved in compiling product data, with the simultaneous assurance that this is a secure investment, since it introduces a data standard that meets the requirements of a large number of players. Those hungry for data will be able to satisfy their needs in the digital twin in future.

  • For improved software
    Good software requires correct and up-to-date information. This makes it possible to provide optimum support for users in their individual tasks.


What does GLDF include?

  • - Commercial data
  • - Photometric and radiometric data
  • - BIM characteristics to CEN/TS 17623
  • - Individual and parametric geometric data
  • - Mapping of real product variants


Who is compiling and maintaining GLDF?

  • - RELUX and DIAL are developing and maintaining the format.


Who owns GLDF?

  • - It is not legally possible to take out a copyright on a data format, but RELUX and DIAL are jointly maintaining this data and geometry format.


Is GLDF free of charge and who is entitled to use it?

  • - The format description, sample files and libraries for reading and writing are available, free of charge, with the source codes, for use by everyone. Reader and editor applications will be provided free of charge for all interested parties.



  • - March 2021
    Presentation of the GLDF format at “Licht 2021” in Bamberg/online.
    You will find the information here.
    If you have any questions please contact
  • - June 2021
    Completion of the program libraries for GLDF.

  • - Expected January 2022
    Publication of tools such as GLDF readers and editors.
    As of this point in time, RELUX will help industry partners to implement GLDF in their own companies.
  • - Expected 1st - 2nd quarter 2022
    RELUX programs read and interpret GLDF in their own applications.


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