Ideal for urban riders who lock their bikes outside, the Defender steals its style from a six-shooter cylinder à la Dirty Harry. Each chamber holds a LED and the light produces a sum of 50 lumens – plenty for most city riding. Built from aluminum, it weighs in at just over half a pound and installs in less time than it takes to read this roundup. But the true brilliance of the two-setting headlight is a bolt with a proprietary head to make theft close to impossible. [From $64; bikegotham.com]