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GLDF 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 actors in the planning process depend on the right information being recorded for the respective tasks. 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.


Timetable Press release