I've done basically same thing except made it self contained. That way I don't have to mess with wires. Used a Plastic pill bottle, like the one you would get from pharmacy. Picked up LED light that's meant as a car accessory and for power I use a 9 volt battery. Wire It up, Put it in Plastic Pill Bottle and drop It down to bottom. My lights are red. As far as if it works, some times I would swear by it, other not so much. I've also used the Pill method as a noise maker.