Once upon a time, you could hang a string of lights on your house and be as ostentatious as any of your neighbors. But there's always a Clark Griswold who is so enchanted with Christmas that he goes all out. Then we got computerized Christmas lights, which could synchronize your blinking lights with music. LEDs allow us to string more lights together than ever before. And projection lights add another dimension to the possibilities. The result is bigger and better light shows every year. However, it's not always a matter of how big those shows are, but how much care and cleverness goes into them. See some of the best in a list I posted at mental_floss.