Lezyne Femto USB-C Drive Rear Light The Lezyne Femto USB-C Drive Rear Light is a reliable and affordable rear LED bike light, perfect for commuters and recreational riders who want to stay visible on the road. Compact and lightweight, this LED light offers six versatile output modes, including a powerful 15-lumen Day Flash mode for high visibility and a 12-hour runtime in Femto mode for longer rides. With Wide-Angle Optics providing 270° of visibility, the Femto ensures you're seen from all angles. Its durable co-moulded construction is IPX7-rated for water resistance, guaranteeing performance in harsh weather. The versatile rubber mounting strap securely fits various seat post sizes, and the waterproof threaded Composite Matrix cover keeps the USB-C charging port protected from dirt and debris. Perfect for cutting through urban environments in any condition, the Femto USB-C Rear is an essential safety light. Modes (Lumens/burn time): Economy - 5 / 3.5 hours; Blast - 15 / 1.5 hours; Day Flash - 15 / 13 hours; Flash 1 - 15 / 3.5 hours; Femto - 5 / 12 hours; Pulse - 15 / 6 hours