Hi, welcome to the forum
That sounds pretty interesting, having the lights track the person that needs to be tracked. Only downside will be the lights though. They emit IR light as well, so the wiimote will probably pick it up when there's something shiny on the stage. It might work though, if you can make it work with reflecting light on the actor that needs to be tracked. When the wiimote sees any movement to the right, the lights should immediately respond though, otherwise the actor is out of the spotlight area, and won't reflect any IR light anymore. But this definately would be hard to implement, since there's lots of IR light in a theater
