phalanx beat me to it, but he's right, most people who like their neighbors broadcast the music on a radio frequency not used by local stations and post a sign telling people what to tune their radios to so the neighbors don't have to hear the same song 50 times a night, every night, for a month. I have a good friend of mine that does this with his house and large yard for CHRISTmas and the amount of work he puts into it every year is insane. He's retired though, so I guess you have to fill it with something. lol He broadcasts over the radio frequency too, but I guess if you really hate your neighbors you could crank up some external speakers. Would have to be careful though about "Noise polution" and "Disturbing the peace" laws with the latter and would restrict how long you could have your lights going. If you do all that work I would imagine you would want them on as often and long as possible to make it worthwhile. The cops have actually had to get involved with my friend's house the last few years because the line of traffic of cars wanting to go by it has stretched 3 miles long and were blocking intersections, etc so they have to direct traffic now.
