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Download DIALux

Professional lighting design with DIALux.

With this free software you can design, calculate
and visualize light professionally - single rooms
whole floors, buildings and outdoor scenes.



DIALux evo 7

DIALux 4

Whole Buildings

Single room planing

Interaction between indoor and outdoor scene

Road lighting


Daylight control systems

Emergency lighting

DIALux evo 7

Plan complete buildings.

With DIALux evo 7 you can design complete
buildings, daylight and streets.

CPU with SSE2-support · 4 GB RAM (min. 2GB) · OpenGL 3.0 graphics card (1 GB RAM) · Resolution min. 1024 x 768 px · Windows 7 (32/64 bit) · Windows 8.1 (32/64 bit) · Windows 10 (32/64 bit)

Version history ›

DIALux 4

Plan emergency and sports lighting.

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

Version history

DIALux knowledge.

All you need to get started.

LDT Editor

Free tool for .ldt files.

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