With this free software you can design, calculate and visualize light professionally – single rooms, whole floors, buildings and outdoor scenes. DIALux is used as a planning tool by over 600 000 lighting designers worldwide. DIALux constantly undergoes further development and meets the requirements of modern lighting design and lighting calculation. You can plan and design using the electronic luminaire catalogues of the world's leading luminaire manufacturers. Superimpose on the CAD data of other architectural programmes and create your own lighting design.