Exposure lights has the RedEye($44.99) which can be connected to their headlights and powered by the headlight battery or you can purchase a separate battery($44.99) and charger(29.99$).
http://estore.websitepros.com/193951...Eye/Detail.bok
http://estore.websitepros.com/193951...ies/Detail.bok
http://estore.websitepros.com/193951...ger/Detail.bok