Knog Light Blinder Mob V The Face Rear. The Knog Light Blinder Mob V The Face Rear is a powerfully bright bike light which is ideal for your daily commute. The light comes with an, impressive, 44 lumen light output that will ensure that your seen from up to 1.2 kilometers away Mounting System. Like the majority of Knog’s lights this one also comes with a tool-less mounting system that can quickly and easily be attached to your bike. The mounting system for this light is comprised of two silicone straps that will easily attach to any bar or seatpost with a diameter between 22-35mm. This will suit all standard, aero and most oversized bike frames Features. 44 lumen outputWeighs 35gDimensions: 42 x 42 x 62mm100% waterproof35-degree beamLED lightBuy Knog Lights from Chain Reaction Cycles, the World’s Largest Online Bike Store.