Knog Blinder ARC 640 front light review
Trail light that's best as a secondary beam
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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.
Authors
Rob Weaver is BikeRadar's technical editor-in-chief. Rob manages all of the testing here at BikeRadar and across our magazines, Mountain Biking UK and Cycling Plus. Rob first graced the pages of MBUK back in 2001 when working as a freelance writer and went on to start testing bikes for the title in 2007. In 2010 he joined the team full-time and has been keeping a close eye on all things test-related ever since. Rob’s expansive knowledge of bikes comes courtesy of his passion for racing. He cut his teeth racing cross-country mountain bikes in the early 90s before finding his feet in downhill. After many years competing on the UK national circuit (including a year attempting to race UCI DH World Cups), Rob realised his know-how and passion for bike setup, tech and writing clearly outweighed his racing ability. A degree in sports technology and decades of riding experience all help to give Rob a thorough understanding of what’s needed to create a great bike or product. While Rob’s a mountain biker at heart and never happier than when he’s sliding down a Welsh hillside, he’s more than happy to put the miles in on the road or gravel bike, too.
