Running on a regular basis is great for your body and mind. But you need to make sure you stay visible at night or early morning. The Million Mile Light can help. It is a bright, battery-free safety light for runners that is powered by motion. It is visible from over 200 meters and weather proof. It weighs only 36 grams.
The Million Mile Light is pretty easy to use. Just clip it on, and you are set. The above video gives you a better idea how this light works. More information is available here.