The Lightolier system does address some of the shortcomings of X10 and is a fine system but it does so at the expense of the beauty of X10. That is, X10 is reasonably inexpensive and it's universal on all power lines in you home. The Lightolier system couples each individual circuit and acts to prevent signal collisions, unfortunately you have to add it to every circuit in your system and it does nothing for the circuits not on it. By using a good coupler repeater and filtering noise (which you still need to pay attention to with compose) you can get close to the reliability at a fraction of the cost or wiring hassles. I just don’t see the point when X10 can be made extremely reliable by just taking care of the basics, signal strength, noise, not sending two signals at the same time, and quality receivers.

Bill
www.homeautomationnet.com