Use the Artificial Lights dialog to add or remove lights in a light group. 
-  Open the Artificial Lights dialog. 
 
- To add an individual lighting fixture to a light group, do the following: 
- In the Artificial Lights dialog, under Ungrouped Lights, select the lighting fixture. 
 
- Under Fixture Options, click Move to Group. 
 
- In the Light Groups dialog, select the desired light group, and click OK. 
 
 In the Artificial Lights dialog, the selected lighting fixture displays under the selected light group name. 
  
- To remove an individual lighting fixture from a light group, do the following: 
- In the Artificial Lights dialog, under Grouped Lights, expand the light group name. 
 
- Select the lighting fixture to remove from the group. 
 
- Under Fixture Options, click Remove from Group. 
 
 In the Artificial Lights dialog, the selected lighting fixture displays under Ungrouped Lights. 
  
- When you are finished in the Artificial Lights dialog, click OK.