Superfly does not recognize Depth Cue so that is a waste in set up time.  Keep in mind that the PhysicalSurface node emission defaults to Inverse Square falloff which means that you really need a very high emission value.  The only way to change that behavior is to attach a Lightfalloff node, which offers additional Linear and Constant features not found on the PhysicalSurface node.  When using mesh lighting from an object, you can hide the object in the scene by not making it visible to the camera or Raytracing but still display your light.