The Knog Blinder ARC 640 is a sleek front light, but can its function match its form?

Product Overview

Overall rating:

Score 6

Knog Blinder ARC 640 front light

Pros:

  • Sleek design
  • Integrated mount
  • Easy to use
  • Fairly bright

Cons:

  • Mount could be more secure
  • Integrated charger is fiddly

Product:

Knog Blinder ARC 640

Manufacturer:

Price as reviewed:

£89.99
This product is featured in: Best front bike lights in 2017 for under £100.

Compared to many other front lights that cost less than £100, the Knog Blinder ARC 640 has a very sleek design. The mount is permanently attached to the bottom of the light body, meaning there’s no chance of accidentally losing one or the other. However I found that the mount wasn’t very secure, and on bumpy roads it would often rotate backwards, meaning it was pointing skywards rather than at the road – not on potholed tarmac where I needed to exactly what the roads had in store for me.

>>> Best front lights for under £100

As for the light itself, 640 lumens is a little on the low side, meaning that I wasn’t too confident heading out into unlit lanes with just the Knog attached to my bars. However, if you’re just commuting under street lights, or want a nice simple light to attach to your bars when heading out for early morning rides, then it’s a really good option.

knog blinder arc 640 front light

The Knog Blinder ARC 640 has a very sleek design

For your money the Knog Blinder ARC 640 you get three constant modes, and one flashing mode, which are easily switched between using the button on the top of the light body. There are also status lights, which change colour to indicate what mode you’re in and battery life.

>>> Buyer’s guide to rear lights

A final feature is the fact that the USB plug is integrated into the back of the design, but although this cuts down the number of wires on your desk, it makes it a little fiddly to attach.

For more details head over to Todays Cyclist.

Verdict

The Knog Blinder ARC 640 is a good front light which is bright enough to be used in some pretty gloomy conditions, and is also very easy to use. However the mount isn't secure enough to keep it pointing in the right decision, which is a major flaw.

Details

Max lumens:640 lumens
Battery life:1:50 (max beam)
Weight:151g
Charge time:5 hours
Charging:USB (no wires)
Modes:3 constant, 1 flashing
Distributor:www.todayscyclist.co.uk
  • DaveQB

    It is such a shame a good light with a fantastic beam design is basically ruined due to it’s poor mount.

  • rikhelsen

    Had the same issue with the KNOG ARC 5.5 – it simply wouldn’t stay in the desired position. Roads needn’t be that bumpy to cause this either…