High-power taillights are a necessity for winter riding, and the CatEye Rapid 5 is among the brightest lights on the market. It comes with a luminous center light flanked with four L.E.D.s. That gives the Rapid 5 180-degree visibility, according to Cateye, protecting you from cars approaching from winter side streets or behind. With two AAA batteries it'll run for 50 hours on pulse mode.
Brand: Cateye $25