If you use SketchUp as the model source for Shapespark, then it’s usually better to place lights inside SketchUp, using the Add Shapespark Light button (Realtime Rendering Tutorial | Shapespark for Sketchup - YouTube). This allows for easier positioning of the lights, and it also allows to bind the lights to the SketchUp object hierarchy. For example, if you add a light inside a ceiling lamp component, then placing new instances of the component will automatically add new instances of the light.
Object-based light emitters are available in Shapespark. I replied to your emitter wish list item in the other thread.