Adding Volumetric Effect to Existing Lights
Just add the “Volumetric Light” component to any of your lights. Please note that volumetric lights asset is currently compatible with point, spot, and area lights.
Optional: Create or assign a volumetric light profile
You can create a new volumetric light profile at any moment and assign it to the component.
Right click in on the Project panel and select Create -> Volumetric Light Profile: