Tip - How to Make Your Christmas Lights Flash to Music

You've probably seen videos of Christmas lights that are synchronized to music. The single from the most-watched YouTube video of all time — PSY's "Gangnam Style" — has even made it into a Christmas lights extravaganza. (See video below.) I...
Tags: WikiHow, Make Your Christmas Lights Flash to Music, wiki, how to articles, how to instructions, DIY, tips, howto, learn, how do I