The Light Editor provides a convenient way for you to manage the lights in your scene. Use the Light Editor in conjunction with the Render Setup editor to easily create light overrides for your render layer.
Click on the status line, or double-click the Lights tab at the top of the Render Setup editor to open the Light Editor. All the lights in your scene are listed.
To display the light attributes for each layer, including the Scene layer, set it as visible. You can also select the layer from the drop-down list in the Light Editor.
This enables you to:
Override specific light attributes in a render layer, and set the override values
Examine the light attribute values in the current render layer
Disable a specific light or lights in a render layer by overriding the Enable attribute
The Light Editor always reflects the values for the render layer that you are in. For example, if you are in the scene layer, the Property Editor displays the scene values for each light. When you are in a render layer, the Property Editor displays the values set in the current layer for each light.
Lights are automatically added to each render layer by default. To override this behavior, disable Options > Include all lights in each render layer by default in the Render Setup editor. You can then add specific lights to each layer's Lights collection. See Add lights to a render layer.
Overridden values are denoted in orange. As soon as an override is created, a Lights collection is created for your layer in the Render Setup editor, if it does not exist already. A collection containing the light you just modified is created within this Lights collection, as well as the corresponding override.
You cannot drag and drop the Lights collection in a render layer into another collection within the same layer.
You can only cut, copy and paste the Lights collection from one render layer to another. You cannot cut, copy and paste individual light overrides or individual light subcollections.
Overridden attributes appear in orange, and animated attributes appear in red.
Attributes without any overrides applied appear in white. Locked attributes also appear in white, but cannot be edited.
To disable a light in the layer, override its Enable attribute.
The icon appears with an orange border to indicate that it has an override applied, and the Enable attribute appears in orange.
Opening the Light Editor creates a connection between the editor and the Visibility attribute on the light shape nodes in your scene. This connection enables you to control the visibility of lights using the Light Editor's Enable and Isolate attributes; however, the Visibility toggle in the Attribute Editor also becomes unavailable.
If you, however, right-click on the Visibility attribute and select Break Connection, the icon for the corresponding light appears with a red border in the Light Editor to indicate that you can no longer use this icon to control the light.
To override the Visibility attribute, do one of the following: