B&M Toplight Line Plus Braketec rear light

For a while now I’ve had my eye on the B&M Toplight Line Plus with Braketec. The standard Line Plus uses a pair of LEDs and some clever optics to produce a line of red light rather than just two spots. The logic behind this is that diffusing the light into a line makes it easier for following traffic to judge the distance of the light, whilst also being less likely to irritate those following.

The Braketec version of the light also features a signal processor which detects the change in the dynamo AC frequency when the bike slows rapidly, momentarily increasing the brightness of the light to indicate the rider is braking. Whilst I have my doubts about the usefulness of turning signal lights for bicycles, I expect that a brake light will at least be correctly registered by following motorists despite the relative rarity of brake lights on bicycles. However, the main reason for wanting to try this light out are not because of the potential minor safety benefits which come from the brake light function, but because it is quite a clever idea, executed in an interesting way.

The light is bright, although the rack mounting on the Brompton makes for rather poor side visibility. Thankfully this is made up for by the reasonable side visibility of the front light an the reflective sidewalls of the Marathon Plus tyres. The brake light function works without any calibration required, regardless of whether you are using a hub dynamo with large wheels, small wheels or a bottle dynamo. It just works.

The effect is pretty clear in the video, but viewed by the human eye rather than through a digital camera it is much more pronounced.

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10 thoughts on “B&M Toplight Line Plus Braketec rear light

  1. Hi,
    Interesting post, As a fan of B&M gear it was good to see this light in action. It does give an increased light output when braking which obviously is at it’s best at night (does it work in the day?) and I would imagine most useful when traffic is close behind so their attention is already on you.
    Not a new idea though as a brake light that used the calipers of the rear brake was available many years ago.

    • It does work in the day, although I imagine it is of limited usefulness in bright light.

      The caliper-activated brake light is something I’d heard of, although I like this solution more because it doesn’t rely on any extra wires or moving parts for switching.

  2. Pingback: Obligatory yearly lighting post | Chester Cycling

  3. Hi, I’m planning to buy a light like to this to my Brompton, that is a version L, without the rack but with the mudguards. Is it possible to mount the light on? What is the height of this rear lamp compared to the standard Brompton rear light? (as the space is very limited during folding up the rear triangle, if the light is too tall, it will collapse to the gound…) Thanks in advance for the reply.

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