A friend of mine has got a genius set up and he`s never been broken into, you can buy for about £20 a 500w external lamp with a pir attached but it also comes with a plug in internal chime, so when the light comes on the chime goes off. Being the clever dick that he is who also happens to like his music, he has an ols cheap hifi system in his lock up, but it sounds great. he then recorded the nastiest sounding wolfhound I have ever heard it sounds like a warewolf on steroids. Well he wired his chime to the stereo system so now when the light is activated by an intruder it sets of this hifi system with the tape of the warewolf, upon hearing that thing all potential intruders have fled, and he has a camera up so i`ve seen the evidence of them legging it. All in all he spent less than £100 for 4 lights.
Tim