Download DIALux
and product catalogues
DIALux evo 9.2
The worldwide standard in lighting design software
Design, calculate and visualize light for single rooms, whole buildings, streets, outdoor areas and daylighting. DIALux is free and open.
Download DIALux evo DIALux FAQ ›
Latest Version
5.9.2.52141 (2021-03-02)
Hardware requirements
CPU with SSE2-support 4 GB RAM (min. 2 GB), OpenGL 3.2 graphics card
(1 GB RAM), Windows 8.1/10 (32/64 bit), resolution min. 1024×768 px
Language support
Čeština, Dansk, Deutsch, Eesti, English (UK/US), Español, Français, Italiano, Magyar, Nederlands, Norsk, Polski, Português, Română, Slovenščina, Suomi, Svenska, Türkçe, Ελληνικά, русский, 한국어, 简体中文, 繁體中文, 日本語.
DIALux 4 (outdated)
You can download DIALux 4.13.0.2 here, if you still need it. Use DIALux 4 for emergency lighting only. We recommend to use DIALux evo otherwise.
DIALux Pro Features
– Extensions to DIALux
DIALux product catalogues
We cooperate with all leading brands in the lighting industry. You can download their catalogues here to use the products in DIALux.
You can support DIALux by using products and data from DIALux partners. Learn more here.
The asteric (*) indicates a premium partner.
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You want to become a DIALux partner?
Get more information about the DIALux partnership.
Related Tools
LDT Editor
Use our LDT Editor for editing EULUMDAT files (*.ldt).
Please notice: We recommend that you use luminaire data in ULD file format (*.uld) from DIALux partners for your lighting designs in DIALux. Learn more in our DIALux FAQ.
Download LDT Editor
Hardware requirements
Windows 7 (32/64 Bit), .Net Framework 4.5