Downloading the software is the first step. Mastering it is another. Fortunately, there are many free resources:
DIALux evo 8.2 remains the industry standard for professional lighting calculation, and the fact that it is free is remarkable. Version 8.2 is not a revolutionary overhaul, but rather a stability and workflow update. If you are an electrical engineer, lighting designer, or architect, this software is an essential tool, though it comes with a steep learning curve. dialux evo 82 free
DiaLUX Evo is useless without luminaires. Use the integrated Plugin Manager to download IES files from brands like Philips, Osram, Zumtobel, and Eaton. These are free and updated monthly. Downloading the software is the first step