Lezyne hecto drive rear light 15lthe lezyne hecto drive rear complements its front counterpart perfectly delivering a highly visible 15 lumens in flash and blast modes the side visibility design allows 180 degrees of visibility and increases user safety the light easily attaches to a wide range of round seatpost diameters via a snap fit composite matrix mount with a multi position silicon rubber strap for tool less installation the dedicated rear mount points upward to ensure light is direct