Originally Posted by
DiabloScott
Most versatile and least restrictive is one of these strap things - they can go over a bulky jacket or a thin T-shirt and they don't flap in the breeze like a vest.

+1 for Amphipod Xinglet. They make a variant with LEDs, too, but I haven't tried it.
http://www.amphipod.com/products/vis...xinglets/belts