I bought an old trench coat from a thrift store and outfitted it with 350 programmable LEDs , an Arduino to control them, and a 24 AA battery bank for a music festival last year, it was a hit. I'm currently working on adding another 150 LEDs, fixing the power system (I burnt out the Arduino after a couple hours), and looking into adding a microphone and learning some sound programming to make the suit change colours to the beat for this year. I always wanted a living technicoloured dreamcoat.