Ours is actually a little bit Disney inspired. We were at Fantasmic a few months before Halloween and saw all the LED Merchandise they were selling. We thought it would be great to give them away for Trick or Treat. Came home, did some internet searches and found that in bulk we could get LED necklaces for about a buck a piece. A little pricey, but we didn't get that many trick-or-treaters so we went for it.
It has now been several years and we have a reputation. Last year we gave out 350 - and right now I have 500 sitting in my living room for this year. We live at a point where two subdivisions come together - and everyone heads here (our neighbors have told us that as our T-or-T volume has increased, so has theirs so they have to buy a ton more candy).
We do trick-or-treat after dark on Halloween -so the parents love it. Come to our house first, get the necklace and then have the kids wear it all night. We have kids who show up wearing their collection of LED necklaces that they have gotten over the years.
We also over-decorate for Halloween so we are referred to as the Halloween house by all the kids in the neighborhood.