Sure, bike reflectors can help you stay visible — as long as you're actually on your bike. Only the Halo Belt ($75) can keep you visible even if you fall off. This multipurpose, LED-laden accessory emits its light though a custom-designed thermoplastic polyurethane fiber optic, which gives it a Tron-style look while allowing it to be worn as a standard belt, over the shoulder, or flung wildly at a narcotic-fueled rave.