wireless switch?

[PFWAG]

Check out the stuff from Illumra.

http://www.illumra.com/

They using "energy harvesting" transmitters. No batteries.

I haven't used the AC control receivers but have used the DC control ones for some LED lighting. They worked great.

 

[ronaldrc]

This one is also batteryless


http://home.comcast.net/~ronaldrc/wsb/at.htm