Just wanted to chime in here, so everyone/anyone can see MY opinion on this. As far as which version was in which film, I have no idea.
When the circuit was designed, I was asked to program the two sets of characters (seen in either version of the lights). The result was what is now called a 2-stage set. I can't say whether this is screen accurate or not, or which movie it's from, because *I* personally haven't been able to see the lights sequencing. The characters were provided to me/us by other TDH members who spent a LOT of time looking at blown up images and video from the movies. The origin of the 3-stage was just that I didn't like the toggle look (bouncing between 2 sets of characters). Since one stage looked like a deteriorated version of the other stage, I thought a countdown effect would look cool. I programmed one this way, and it reminded me of the wrist comm thing in Predator. Others liked it, and so I gave the option.
Now, in another thread, someone asked which was more screen accurate. I believe the end result was that the 3-stage was considered to be so. As stated above, if one is more accurate to one movie than another ... you'll have to defer to the Fett experts for that one.
Thanks,
ATM
ShackMan