Knog's Blinder 4 light series packs a huge amount of light into a tiny package. A simple white circle pattern alerts people to your presence so you'll be seen riding through the dark. The optics are arranged to direct light in a powerful beam, while the waterproof body attaches to seatposts and handlebars with ease. A USB port allows for convenient recharging, and tactile buttons make for easy operation, even while wearing gloves.