DIALux Free

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Video tutorial and screenshots

  • Main Window
  • Luminaire Selection
  • Floor Plan
  • Setup Download
  • Main window
  • Install window

Editorial review

All comments (5)

Daniel Ángel Romero Senior editor

The following review written by one of the Software Informer contributors applies to version 4.6
DIALux is a planning program for the presentation of projects.

By using this program, you will be able to plan the lighting you will use in a room, scene or building. The program will be able to calculate and visualize the daylight, as well as letting you plan your lighting scenes, plan the color and intensity of the lights you will use, position on the project the emergency lighting, with the right legal number of luminaires, and many more.

With DIALux you can prepare photo realistic visualizations of your light planning and send them to your customers via email, or upload them to a server.

For a better realism, the program can use different textures and furniture, and it uses an integrated ray-tracing module. You can also save your results in a .PDF format file, or export to .DWG and .DXF files. You can even import files in those formats to apply the lighting with DIALux.

The furniture, surfaces and luminaires can be placed simple dragging and dropping elements from the provided libraries.


  • It´s a complete and free tool to plan the lighting of any project.


  • None.

What's new in version 4.1

- In the last version of DIALux the specification for luminous flux was changed. DIALux no longer displayed the luminous flux of the lamp but instead the luminous flux of the luminaire. Many users were unhappy with this, because for their documentation they also required the luminous flux of the lamp. With our latest update we have taken this frequently expressed wish into consideration and now in the list of items display the luminous flux not only of the luminaire but also of the lamp. For absolute photometric data these values are identical.
- The setup had to be adjusted because of the operating systems supported by DIALux. For systems which have already been installed there is no change: Future updates will not cause any problems.
- Sometimes when the list “luminaires last used” was full it was not possible to start the DIALux Light Assistant or the selection of the luminaire caused the system to crash. This fault has now been remedied.
- When transferring information into street scenes the new “Street Plan Editor“ sometimes transferred non-initialized values wrongly. This led to deviations between the Editor and the results of the final calculation. These problems have been remedied.
- Our customers informed us that certain translations in the new Editor were unfortunately not quite correct. These have been corrected.

Publisher's description

This official description applies to version 4.9

DIALux it is a light planning software,including features like:

- Planning with LED luminaires and other coloured light sources, colour filters and coloured materials
-Interactive 3D visualization allows you to just wander round the room
-Film the camera run through the photorealistic visualization of your planning and send the film by email.
- Realistic textures and furniture
-Integrated ray tracing module for photorealistic presentation

Latest comments

  All comments (5)
  • 0
    aurelio 2 years ago

    Very useful for calculating.

  • 1
    Guest 4 years ago

    adobe is verry benefic if you want to read video on intenet (youtube)

  • 0
    Guest 4 years ago

    I'm an Electrical Engineer, it is a clear and useful guide in problems regarding illumination.