I just saw this, years later. But for what it could be worth, it’s doable to make the lamp do things. I would start (in Sony Vegas Magix 14) on the lamp event with the video event,
“sphereize.” I would do the Ken Burns Effect thing, i.e., “animate” the sphereize. Most likely going into the negative about 60%. I’d play with thg center of the spherizing. And with pan/crop. And maybe with doing the same thing with video effect “light rays,” moving the center of the light rays around from beginning of the lamp event to the end. The pan/crop function could help the lamp to appear to jump, if done with several points or diamonds. And I don’t know how realist the intent was, but copying the event and changing the second one’s pan crop a little (say, pulling the four edges in closer a little) and then overlapping the two events a bit. One could do this and then make a still of it (it’s in help). Guess I’m trying to say that video event effects might be able to produce something like the effect wanted. And I agree that to get it just right would not be easy/quick.