Light rigs are groups of infinite lights, parented to a null, whose direction, color, and intensity are calculated by analyzing the luminance of a .hdr or .pic image.
The options described below appear in the Light Rig Builder Options dialog box, which opens when you create a new light rig, in which case they are used to configure the new rig.
When you open the Light Rig Builder Options property editor, it displays the options used to create the most recent light rig in the scene.