Outside of the fact that to do this you'd have to somehow isolate the lights completely from all the rest of the vehicle least you create a momentary but spectacular display of sparks and molten metal and, given the correct conditions, an explosion of some magnitude when you "armed" your security system, yes, it could be done.
But, I believe there a number of legal cases which have held the "inventor" of such systems liable when their hatchling lands some would be thief in the hospital or a casket.
Now, don't be heapin' flames on me...this was not **MY** doing. I'm just saying you gotta think twice before doin' something like you're talkin' about. Anyhow, if it didn't kill them (and in most cases it wouldn't of course) the shock might just p*ss 'em off enough that they take it out on your :exp:
All kidding aside, a more conventional alarm system would be my choice.
. Mainly because of the potential for a lawsuit, and don't say it'll never happen... but some guy tries to steal your lights, gets electrocuted, you know he'd sue you and he'd win too, not that it would be enough to kill or maim anyone, but I'd still say its a no-no. I'd for something to come in cotact with that wire/bolt and either short out the battery, drain the battery, weld the bolt to the body, etc. If you really want to protect your lights you have a few options. PIAA and Mcguard and a few other companies (PIAA actually uses Mcguard locks) makes light locks, much like lug nut locks, they have a key that you have to have to turn the lock. PIAA also makes a module so that you can hook up those bolts to your car alarm, and if someone tries to steal the lights the car alarm will go off... something to keep in mind!
).Later.
