I've got a ghost that every now and then turn all of my X-10 controlled lights on. I want to find the source of this but I need some help.

What radio frequencies do X-10 transmitters use? Are these frequencies also used by other consumer products? Is it possible that, say, some kid playing with a remote controlled car could intitate an X-10 event in my house?

Are "ALL LIGHTS ON" X-10 commands functionally simpler than any others? If my ghost is a neighbor using X-10 devices, I'd think there would be other events happening than just an occasional ALL LIGHTS ON. If it's a blip in my electrical system (fluctuation in current) I'd also expect more different events.

The only other input to suspect is my IR543. When the ghost appears I'm usually the only one in the house, and not anywhere near my Pronto or any other IR X-10 controller. Is there anything that might send a stray IR flash that a IR543 might mistake for ALL LIGHTS ON?

Has anyone else had this problem? Tell us about it here. Thanks.

Dave