DIALux, the light planning software for the professional planning, calculation and visualisation of light, is available free of charge from the website of the German Institute for Applied Lighting Technology (DIAL).
On our product pages you will find DIALux files for downloading as .uld files. Using the transfer link you can apply the data directly in the currently opened project.
More information about DIALux: 
https://www.dial.de/en/dialux/
https://www.dialux.com/en-GB/download