Martin, thanks for the reply. I've looked into the Lightolier a little bit...seems like it's well above the other X-10 stuff but still concerned with reliablity compared to something like RadioRa. I've done quite a bit over the last few years with audio/video distribution but this is my 1st attempt at lighting control (besides a boat load of individual dimmers). Do you have clients with the Lightolier in the 8000 sq ft and plus range?