You can download without registering, but creating a free DIAL account allows you to:

A common question is: "What features am I missing by not paying?"

In DIALux evo 8.2, the core calculation engine is free. You do not lose calculation accuracy. The paid versions (DIALux evo Pro) primarily unlock features for massive companies, such as:

Search for "DiaLUX Evo Essential Training." There is a 4-hour course by instructor Jorge Lopez.