First, let us clarify the nomenclature. "Dialux 43" is shorthand for Dialux version 4.3. This specific iteration was a milestone release. While Dialux 4.0 introduced the basic interface, version 4.3 refined the calculation engine and introduced better compatibility with AutoCAD files (DWG/DXF).
Dialux is a planning tool for professional indoor and outdoor lighting. It allows engineers, architects, and lighting designers to:
Dialux 4.3 is freeware. Unlike its successor, Dialux Evo, version 4.3 operates on a classic "grid-based" modeling system, which many long-time professionals prefer for its speed and predictability.
Search YouTube for:
"DIALux 4.3 tutorial" or "DIALux 4 interior lighting design"
Many are in German or English from ~2012–2014.
If you actually meant DIALux evo 4.3 (a newer version — but note: evo version numbers are different; the latest is evo 12+), please clarify. Otherwise, the above applies to classic DIALux 4.3.
Would you like a direct link to the archived DIALux 4 manual PDF or help converting a 4.3 project to evo?
DIALux 4.3 remains a significant milestone in the evolution of lighting design software. Developed by DIAL, this version of the classic software continues to be utilized by professionals who require a reliable tool for indoor and outdoor lighting calculations. While the industry has largely shifted toward DIALux evo, the legacy of DIALux 4.3 persists due to its lightweight nature and specific functional advantages in standard lighting projects. The Foundation of Professional Lighting Design
At its core, DIALux 4.3 is an advanced lighting design tool that allows architects and engineers to create optimal lighting solutions. The software enables users to simulate light distribution, intensity, and quality within various architectural environments. By using DIALux, designers can ensure that their projects meet specific industry standards and compliance requirements. Key Features of DIALux 4.3
The popularity of DIALux 4.3 stemmed from several robust features that simplified the complex task of lighting simulation:
Accurate Calculations: It provides detailed lux level calculations, ensuring light reaches every corner of a space as intended. dialux 43
Energy Efficiency Analysis: A critical feature of this version is the ability to analyze power efficiency. Users can detect opportunities for improvement to reduce environmental impact and operational costs.
Visualisation Tools: While less advanced than modern ray-tracing engines, version 4.3 offered clear enhanced design visualisations that helped clients understand the impact of lighting layouts.
Broad Compatibility: It supports data from numerous luminaire manufacturers, allowing for precise modeling with real-world products. Why Designers Still Use Version 4.3
Despite the release of newer versions, some professionals prefer DIALux 4.3 for specific scenarios:
Simplicity for Small Projects: For straightforward indoor or outdoor calculations, the streamlined interface can sometimes feel faster than the more complex evo platform.
Legacy Integration: Many long-term lighting designers have extensive project libraries built within the version 4 environment, making it easier to reference or update older files.
Hardware Requirements: Version 4.3 is remarkably lightweight compared to modern 3D modeling software, allowing it to run smoothly on older hardware configurations. Technical Requirements and Performance
To run lighting simulations effectively, the software requires a stable Windows environment. According to DIALux Support, professional use of their platforms generally recommends:
RAM: Minimum 4 GB, though 8 to 16 GB is recommended for professional workflows. First, let us clarify the nomenclature
Graphics Card: Support for OpenGL 3.2 with at least 2 GB of dedicated memory.
Operating System: While modern versions require 64-bit Windows 10 or 11, legacy versions like 4.3 were designed for high compatibility with older Windows architectures. The Transition to DIALux evo
While DIALux 4.3 is highly capable, the industry has largely moved to DIALux evo. The newer platform allows for entire building designs rather than individual room-by-room calculations. However, for those focusing on individual luminaire performance and rapid "workhorse" calculations, version 4.3 remains a respected name in the field.
By using tools like those found at Brite Singapore, designers can further understand the importance of these simulations in achieving energy efficiency and cost savings. If you are looking to start a project, let me know: Are you designing for an indoor or outdoor space? Do you have a specific luminaire brand in mind?
What is the primary goal (compliance, aesthetics, or energy savings)?
DIALux 4.3 is a legacy version of the professional lighting design software developed by DIAL GmbH. Released in early 2008, it served as a critical update in the DIALux 4 series, introducing advanced daylighting simulations and enhanced 3D visualization tools for its time. Key Features and Capabilities
Advanced Daylighting: Introduced daylighting calculations using CIE models, allowing for simulations under clear, overcast, or cloudy sky conditions.
GUI Enhancements: The version saw significant interface updates, including new calculation objects, colored ground plans, and improved building geometry tools.
Visual Analysis: Added "traffic light" indicators to verify if specified lighting values were met and false-color scales for quick visual identification of light distribution. Dialux 4
Standards Compliance: Integrated EN 12464-1 and ROVL/NPR 13201 norms for indoor and street lighting planning.
Calculation Surfaces: Enabled the separate presentation of results for 12464-1 surfaces within room summaries and the ability to toggle individual surfaces on/off. Technical Specifications Requirement / Detail Operating System Windows XP, Vista (Legacy) Minimum Hardware 1.4 GHz CPU, 1 GB RAM (recommended for smooth operation) Architecture 32-bit application Language Support Multi-language interface, including 26+ major languages DIALux: All versions - Software Informer
You do not need manufacturers' CDs anymore (though old-school users love them). Dialux 4.3 supports importing *.ldt (Eulumdat) and *.ies (IESNA) files. You can drag and drop any light fixture from thousands of online catalogs directly into your plan.
In 4.3, the user didn't model a "building" in the architectural sense. They modeled "rooms" or "exterior scenes." This modular approach was incredibly fast.
Unlike Evo’s "working plane," Dialux 4.3 uses explicit calculation surfaces. You draw a grid on the floor, wall, or ceiling, and the software calculates the lux at every intersection. This is essential for sports lighting (vertical illuminance) and emergency lighting (0.5 lux lines).
Dialux 4.3 files were self-contained and relatively lightweight. They were easy to email, easy to archive, and rarely corrupted. This stability made it a favorite for large engineering firms with rigid IT infrastructures.
DIALux 4.3 is a free, professional lighting design software developed by DIAL GmbH. It allows users to calculate lighting levels (illuminance, luminance, glare, UGR, etc.) based on real photometric data from nearly every major luminaire manufacturer (Philips, Osram, Zumtobel, Eaton, etc.).
The ".43" refers to the minor build version. DIALux 4.0, 4.1, and 4.2 each added features (like street lighting wizards and emergency lighting modules). Version 4.3 was the polished, bug-fixed, final stable release of that lineage. It includes: