While we're usually the first to point out how dorky it is the wear clothes that light up, this LED jacket, designed by Leah Buechley, qualifies as the exception. The lights on the back of it are arranged in arrow patterns — a great way for cyclists to let cars and bikes behind them know if they're turning. As long as the controls are easy to use, it should be great, though it might be bad if they're easy to accidentally trigger… no one wants to see the bicycle equivalent of the forever-blinking turn signal.
Once you're indoors, the jacket has multiple uses — from directing people to the men's room to letting them know how you plan to vote in November. And, of course, making you look dorky.