The .obj format does not include light source information. But .obj files can be combined with the included lightsources to create lights.

If you want a model in the catalogue to have one or more light sources, (and show up with a light power setting in model properties), you need to add advanced properties in a catalogue advanced properties - starting with creating a library with the Furniture Library Editor, see other downloads.

The detailed approach to adding light-source properties to models can be found in several threads. There is also a very brief description of light source properties with an example in the SVG mini-guide.

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