JellyBelly, love your name.
I use LED Light Vest, it provides path lighting in the full on mode or when you run when path lighting is not needed it has a flash mode. Local law enforcement officers tell me that the LED Light Vest makes you visible for over 3 miles. The vest comes with a rechargeable battery pack and a smart charger to keep your battery charged. The vest runs for over 4 hours on a charge and weighs in at 11 oz. Check it out at http://www.ledlightvest.com/