We use something similar for keeping racoons away from our goldfish pond near the patio...motion detector light combined with one of those electronic dog barking things. Never have seen any deer up by there, either, now that you mention it <grin>. Deb in Houston Byron wrote: Get a 2 light set up with a motion detector. In one socket have a light second socket put in a screw in adapter, Plug in a radio tuned to something like acid rock, Make a waterproof cover for radio.