DIALux evo
Free, with limitsIndustry-standard free lighting design
Free tier & pricing
Full professional lighting calc/visualization is free forever; only luminaires from non-member manufacturers and IFC/BIM and Office export require the paid DIALux Pro subscription.
Last verified Jun 23, 2026. Report a change →
The short answer
The world's most widely used lighting design software for calculating and visualizing indoor, outdoor, street and emergency lighting to standards.
The facts
- Pricing
- Paid · Free, with limits
- Free tier
- Yes
- Runs in browser
- No
- Platforms
- Windows
- 2D / 3D
- Good 3D
- Learning curve
- Moderate
- Export formats
- —
The catch
- Desktop install only — no browser version.
- Designs only with this brand’s own catalog.
Best for
Architectural and outdoor lighting engineers