Spotlight [Light], such as a reflector spotlight or a lantern.
A SpotLight light is a type of [Light] node that emits lights in a specific direction, in the shape of a cone. The light is attenuated through the distance and this attenuation can be configured by changing the energy, radius and attenuation parameters of [Light]. TODO: Image of a spotlight.
http://docs.godotengine.org/en/3.0/tutorials/3d/lights_and_shadows.html