Aditia A. Pratama posts a tutorial looking at using light groups in Blender, showing how to include or exclude the effects of lights for objects, surfaces and materials when rendering scenes.

In this tutorial, I’ll explain how to use light group in blender. This is cool feature that can isolated lamp for specific materials on the object

Aditia A. Pratama provides a couple example for using light groups in Blender, and also provides some great tips along the way for using light groups with the Blender Cycles rendering engine.