Its been a while since I played this table, but (as mentioned) i think the only way to get a Special lit is to knock the vari-target all the way back.
If I recall, there is a difference (perhaps x10) between 3-ball and 5-ball games and roto-target scoring. I think the roto-targets are 100-500 for a 3-ball game and 1000-5000 for a 5-ball game. I don't recall if/how the 10X lite gets lit in play.