The Lab: The Busch + Müller LEVAL curve light – The clever assistant

The Busch + Müller LEVAL curve gentle is a brand new addition to the German bike gentle producer’s vary, designed to enhance illumination, particularly on darkish roads and paths, for just below 100 euros. Dive into our evaluate to search out out if the curve gentle impressed us in our take a look at.

Busch + Müller LEVAL curve gentle | Tester: Rudi | Check period: 3 months | Value: € 99.90 | Producer’s web site

If you happen to’ve ever ridden your ebike house late at evening, you’re in all probability conversant in a typical downside that your bike’s factory-installed lights fail to supply sufficient visibility on unlit roads and paths. The everyday options are both to spend money on a a lot brighter – however costly – gentle or to connect a secondary gentle to your helmet, which is probably not formally accredited for highway use. So what’s the choice? Enter Busch + Müller. With an RRP of € 99.90 (the LEVAL is on the market from many on-line retailers for lower than € 60), the LEVAL curve gentle lets you maximise the efficiency of your present gentle whereas complying with German highway site visitors laws.

Intelligent assistant – The Busch + Müller LEVAL curve gentle intimately

The Busch + Müller LEVAL curve gentle is mainly an digital assistant, though the identify “curve gentle” means that it’s a entrance gentle. In truth, it’s a small digital part mounted between the sunshine bracket and the entrance gentle. The entire system will be positioned both on the crown of the fork or on the handlebar, and will be put in upright or suspended, relying in your choice. In case your lamp is mounted on a non-steering part akin to a entrance rack, the LEVAL won’t work correctly and isn’t meant for this objective. Nevertheless, should you want to improve your present lamp with a curve gentle, you need to test that the sunshine you have already got is appropriate with the LEVAL.

A small button beneath the curve gentle switches the swivel operate on and off.
The curve gentle swivels the entrance gentle within the course of steering when cornering and …
… stays perpendicular on the straight.

The present gentle have to be linked to the ebike battery and be inside the vary of 5–15 V. It may be operated with a separate battery, however that isn’t permitted in Germany. The LEVAL will even work with a dynamo on analogue bikes. Lamps such because the IQ-XM E Highbeam and the CYO Premium E from Busch + Müller are nicely suited to the LEVAL as a result of they match the required voltage between 5 and 15 volts and in addition meet the opposite necessities. Then again, fashions such because the Busch + Müller BRIQ-S E or the Busch + Müller IQ-XL E Highbeam will not be appropriate with the LEVAL as a result of their voltage vary is simply too excessive they usually may harm the curve gentle.
As well as, the burden of the lamp should not be too excessive. Busch & Müller don’t specify the utmost load capability, nevertheless it ought to be ample for many commercially accessible lamps. Solely very heavy lamps may trigger an unstable gentle sample.

If every little thing is appropriate, the ability cable of the put in lighting system should first be linked to the LEVAL curve gentle. To do that, disconnect the ability cable close to the lamp and insert each ends into the openings of the cable plug equipped. Warning! When disconnecting the cable, guarantee that you’ve at the least 200 mm of cable on the finish the place the lighting system is suspended. The cable plug is then inserted into the curve gentle. Now mount the digital assistant on a positioning adapter plate, which in flip is connected to the fork crown or the handlebar. The LEVAL will be fitted in 4 completely different positions on the adapter plate to permit for the very best alignment of the sunshine beam.

In case your lamp is fitted with an exterior reflector on the underside of the lens, the motion could also be restricted. There isn’t a exterior adjustment within the system to inform the inner tilt sensor whether or not it’s stage and the sunshine is shining straight forward.

When the LEVAL is used for the primary time, it calibrates itself and aligns itself to what it believes to be a stage place. If the LEVAL fails to do that after a number of makes an attempt, it should point out that one thing is mistaken by briefly swaying left and proper. The producer present detailed set up and working directions.

The system solely works when the ebike is switched on and the lights are in use. There’s a change on the underside of the assistant that you should use to deactivate the curve gentle assistant operate, if you wish to use the ebike as a torch.

The Busch + Müller LEVAL curve gentle in use

If you happen to put the Busch + Müller LEVAL curve gentle by way of a cone slalom, you’ll see its skill to deal with speedy adjustments in course and to light up the meant space shortly and precisely. At first, you would possibly query the true added worth of the curve gentle. Nevertheless, if you deactivate the lean sensor utilizing the change on the underside, and lock the sunshine within the centre place, the advantages of the system develop into obvious. It’s because the lean sensor within the curve gentle additionally robotically detects whether or not the handlebar is being turned in or whether or not the bike is leaning right into a bend, and takes the suitable motion. The Busch + Müller LEVAL not solely turns to the facet when cornering, but in addition raises the sting of the sunshine on the within of the bend. If you happen to lean exhausting right into a bend with out the curve gentle activated, the sunshine beam on the within of the bend drops sharply and strikes near the entrance wheel. The road that the ebike is definitely taking within the bend is not illuminated. With tilt sensor activated, nevertheless, the sunshine beam ends precisely the place you propose to go.

Gentle beam with out utilizing the curve gentle.
Gentle beam when utilizing the curve gentle.

In our take a look at, the producer’s declare that no exterior adjustment is required was not solely correct. Sometimes, the curve gentle didn’t swivel again to its beginning place. As an alternative, the beam would generally level barely to the left.

Conclusion on the Busch + Müller LEVAL curve gentle

All in all, the Busch + Müller LEVAL curve gentle doesn’t change a super-bright excessive beam, however it’s a intelligent answer for comparatively little cash that gives a terrific benefit on unlit roads. In apply, the LEVAL curve gentle impresses with its excessive response velocity and good illumination. Set up of the Busch + Müller LEVAL curve gentle can also be fast and simple due to the detailed directions and will be carried out by virtually anybody.


  • straightforward meeting
  • excessive response velocity
  • sensible lighting idea


  • straight gentle beam can’t be manually adjusted
  • doesn’t work with very highly effective lights

For more information go to

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Phrases: Benedikt Schmidt Images: Mike Starvation, Antonia Feder

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