The Light Lister is a modeless dialog that lets you control a number of features for each light. You can also make global settings that affect every light in your scene.
To display information, this dialog requires at least one light object in your scene. For a selected light, this dialog is a shortcut to the same functionality available on the Modify panel 
Parameters rollout. Global settings are duplicated on the Environment panel.
Note: The Light Lister cannot control more than 150 unique light objects at a time (instances of a light don't count). If there are more than 150 unique lights in your scene, the Lister displays controls for the first 150 it finds, and a warning that you should select fewer lights. Select fewer lights and then use the Selected Lights configuration.