Knog Blinder ARC 640 front light review£90.00

Trail light that's best as a secondary beam

BikeRadar score3/5Find prices on Bicycle Blue Book

With a claimed 640 lumens and four different power modes (one of which is flashing) to choose from, Knog’s Blinder ARC 640 front light certainly promises a lot.

Related: The best mountain bike lights

You’ll need the adhesive foam strip that’s included stuck on your bar before fixing the Blinder in place though, as without it, even small vibrations can upset its position. The power button used to toggle between modes is small and fiddly to use in gloves. A small indicator light changes colour as the mode changes and you’ll see a helpful, separate red warning light when power is running low.

By alternating between the three non-flashing modes, we could get a few hours out of the Blinder before seeing the warning light. On the trail and at full power, the beam spread is impressive and its reach reasonable.

Though the Blinder ARC is okay as a standalone trail light, we think its better suited to being a backup light, using the helmet mount included.

This article was originally published in Mountain Biking UK magazine, available on Apple Newsstand and Zinio.

Rob Weaver

Technical Editor-in-Chief, Tech Hub, UK
Rob started riding mountain bikes seriously in 1993 racing cross-country, though he quickly moved to downhill where he competed all over the world. He now spends most of his time riding trail bikes up and down hills. Occasionally he'll jump into an enduro race.
  • Age: 36
  • Height: 172cm / 5'8"
  • Weight: 68kg / 150lb
  • Discipline: Mountain
  • Preferred Terrain: Natural trails where the loam fills my shoes on each and every turn
  • Beer of Choice: Guinness

Related Articles

Back to top