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Version, 12.1 Patch 4


Hardware requirements
CPU with SSE2-support 4 GB RAM (min. 2 GB), OpenGL 3.2 graphics card (1 GB RAM), Windows 10 from version 1803 (Build 17134) / Windows 11 (64 bit), resolution min. 1920 × 1080 px

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Download DIALux evo

Design, calculate and visualise light for single rooms, whole buildings, streets, outdoor areas and emergency lighting, taking daylight into account. DIALux evo is the worldwide standard in lighting design software. You can use it free of charge with luminaires by our 403 DIALux Members.

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Do you want to work with luminaires from other manufacturers or with IFC models? Then check out our DIALux Subscriptions!

Use luminaires from DIALux Members

More than 403 luminaire manufacturers are available in the free version of DIALux evo. Some have compiled product catalogues for you, which you can download here.

You are a luminaire manufacturer and want to make your products available in DIALux? Visit