How do LED's behave with X -10 control? I'm assuming you also have to use appliance modules to control them? What advantages over CFL's do you see with them? Most I've seen are quite directional and color rendition wasn't great. They do come on very rapidly from what I've seen.
Just to weigh in on this LED / Appliance Module discussion.
I have LED puck lights (switching wall wart driven), LED ropes, three line driven 5W Cree or Luxeon spot lights, and a couple multi LED PAR 20 bulbs.
I can only use an Appliance Module on the wall wart pucks. All of the other listed LED styles refuse to extinguish when the App Module is OFF. The leakage current through the module is more than sufficient to keep the other LED lights lit all the time.
I, like Dave X10, use Socket Rockets for everything else and they work well, even though X10 recommends "incandescent bulbs only" be used in Socket Rockets.