Skip navigation

Download DIALux

Professional lighting design with DIALux.

DIALux is used by over 600 000 users worldwide as a lighting design software. You can generate effective and professional lighting calculations quite easily. The software guides you step by step through the individual planning processes. From importing CAD data to calculation and final documentation. With DIALux evo you have a complete solution from a single source. DIALux constantly undergoes further development and is adapted to the needs and requirements of the lighting designer. DIALux is free of charge and available in 25 different languages.

Download DIALux evo

Complete buildings. Daylight. Road planning.

Complete buildings


Road lighting


DIALux 4 and LDT-Editor

DIALux 4

With DIALux 4 you can design and implement emergency lighting and sports lighting.

Prozessor P IV or later, 1.4 GHz or faster · 1 GB RAM · Graphic card with OpenGL- or DirectX-Support · Resolution 1280 x 1024 px
Windows XP · Windows Vista
Windows 7 · Windows 8.1
Windows 10

LDT Editor

With the free LDT Editor you can open .ldt files, view and edit technical information.