Standard-compliant planning and simulation of artificial light, daylight and sensors in real
For beginners and professionals in lighting design. Intuitive operation and simple and fast display
of the calculation values.
NEW in update 2024.1 Real-time renderer for impressive visualisations!
Download and use now free of charge
ReluxDesktop is a powerful and intuitive application for the simulation of artificial light
ReluxDesktop allows you to plan individual rooms, entire floors, industrial halls or outdoor areas such as car parks, sports facilities and roads – all in just one piece of software.
Calculation of absolute values, national and international standards, compatible with CAD and BIM systems. ReluxDesktop supports the import and export of different formats. You can also plan sensors using ReluxDesktop – the only software on the market that allows you to do so. ReluxDesktop makes the planning of emergency lighting particularly easy and accurate.
Quick and easy calculation of lighting values in less than 2 minutes using ReluxExpress.
The programme can be extended to meet the users’ needs through add-ons and plug-ins.
Import / export numerous formats: Import (ies, ldt, ROLF, gbXML, ReCad, 3ds, dxf, dwg, xlsx, PDF, geolocations from GoogleMaps), Export (dwg, ReCad,, xlsx)
Interface to BIM: A bidirectional interface to Revit enables loss-free communication with the ReluxDesktop lighting design programme and the ReluxCAD for Revit Add-on.
ReluxDesktop can be downloaded free of charge and used for personal, educational and
commercial purposes. Thanks to the support of industry partners, the software is available free
A large number of luminaires and sensors are provided by RELUX members free of charge for planning purposes. Luminaires from non-Relux members are displayed anonymously and can be displayed by purchasing a ThirdParty licence.
Relux supports lighting designers with a wide range of training and further education courses – from beginner to professional.
Select your environment or room and define its mass and shape. Use CAD drawings, gbXML or Geolocations to create the scene. Or import the room using the Metaroom app.
ReluxNet provides you with over 1 million items for your planning, including luminaires, sensors and 3D objects. You can easily add the files to your ReluxDesktop project with one click.
You can place the selected luminaires and sensors in the room or have them placed
automatically and add windows, doors, objects and measuring surfaces to the room. You assign
the desired luminaire type for the basic lighting.
When the lighting simulation is started, the room is calculated correctly in terms of lighting technology.
A luminaire list provides clarity regarding which luminaires have been placed where in the room. The photometric results can be checked in the 2D and 3D views and then output as tables or false colours.