DIALux 4.13.0.2: Essential Guide and Download Information DIALux 4.13.0.2 remains a foundational tool for many lighting professionals, even as the newer DIALux evo becomes the industry standard. While the developer, DIAL GmbH, no longer officially promotes or offers a direct download for this legacy version, it continues to be used for specialized tasks like and emergency lighting calculations that may not yet be fully realized in newer versions. What is DIALux 4.13.0.2?