Nike is jumping into the wearable safety gear for runners. The Nike Electrolite Arm Band has an embedded soft light. Not only is this very wearable, its comfortable and affordable. It barely wieghs more then a traditional arm band, and is curved so it can be seen from many angles.
Made of a flexible, lightweight, wide-angle wrap-around electroluminescent light bar that flashes on your upper arm. The small water resistant compartment houses two replaceable CR2032 batteries which provide around 20-30 hours of use and a low-profile on/off button. It is reasonably priced at $25.00. Good stuff Nike.