Isolate a subset of lights using the Light Editor so that only these lights take effect in your scene.
Toggle the isolate icon. indicates that isolate select is enabled and indicates that isolate select is disabled.
When you isolate a light, only this light affects the scene. All other lights do not affect the scene and appear with a diagonal line pattern in the Light Editor. You can isolate multiple lights. For convenience, you can also isolate your light group.