Sets the MixedLightingMode that Unity uses for all Mixed Lights in the Scene. (Editor only).
Use this property to choose the MixedLightingMode for the Scene. This defines the real-time behavior of Mixed Lights and determines what lighting data from Mixed Lights is baked into lightmaps.
This setting affects the real-time behaviour of lights, and lightmaps generated by the Baked Global Illumination system.
When Unity serializes this LightingSettings object as a Lighting Settings Asset, this property corresponds to the Lighting Mode property in the Lighting Settings Asset Inspector.
Additional resources: Lighting Settings Asset, Lighting Modes, Mixed Lighting.