A targeted point light is a targeted version of point light. It is identical to point light except that you have to provide a target point.
The following code shows how to setup a simple targetpoint light:
// To setup a targetpoint light AcDbLight pointLight; pointLight.setLightType(AcGiDrawable::kPointLight); pointLight.setPosition(AcGePoint3d(0,0,5)); pointLight.setTargetlocation(AcGepoint3d(0,0,0);)