A SpotLight is a positional light in Point mode including a cone attenuation gizmo.

It illuminates the objects inside the cone. It includes a fade angle to smoothly cut off the light.

Set a gobo texture on a SpotLight
  1. Locate the SpotLight in the NodeList view.
  2. Select its Texture child.
  3. Set the Texture > File attribute with the gobo texture filename.

The spot light with no gobo, with the gobo and the gobo texture.

The User Guide/Lighting/Positional lights section.