I think a bunch of HN readers are also interested in software product design. To me, this looks like a nice example of that. They appear to be taking a selection of fairly complicated functionality and packaging it so that non-technical people (architects?) can use it when discussing lighting options with people who they are helping design their houses.

Yeah, I don't see what makes this software special.

The main technical selling point seems to be the ability to provide quantitative illuminance values, but that feature has been available in both commercial (e.g. 3DS Max) and open-source (e.g. LuxRender) renderers for years.

I thought it looked like a very clever way of advertising. It directly associates the brand with the idea of light.