Busch & Müller IQ-X Dynamo Headlight

The Busch & Müller IQ-X dynamo headlight is a shop favorite. This light scores high for both looks and functionality. The brightest dynamo headlight on the market at 100 lux, it also produces an incredibly smooth distribution of light on the road ahead.
Available in a silver or black anodized aluminum housing, which also acts as a heat sink for the LED. Equipped with a standlight and daytime running lights. Automatically switches between daytime and nightime modes.
Compatible with 6 volt, 3 watt hub or sidewall dynamo systems. 

OUTPUT: 100 Lux
SWITCH: OFF/ON, on uses light sensor
INCUDES: Light w/bracket, dynamo wheel wire, wire for rear light
FEATURE: Can be modified to be upside down

Busch & Müller IQ-X Instructions

Relevant Dynamo Blog Posts: Dynamo Lighting or Charging Devices w/Dynamo Power

SKU: 2918

Availability: In stock


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Busch & Müller



OUTPUT: 100 lux
WEIGHT: 114g
CONSTRUCTION: Aluminum casing, plastic lens
WIRING: 70 cm 2 wire cable
INCLUDES: 2.8 mm female blade connector (2), 210 cm cable (detached), plastic headlamp bracket

Additional Info

Additional Info

Type Dynamo Front Light
brand Busch & Müller


Customer Reviews (2)

one of the best lights I've hadReview by Taylor ➣ Perennial Cycle Sales/Merchandising Specialist
I have been running this light on my winter rig for a few months now and I have nothing bad to say about it. I love that I always have lights on bike and never run out of batteries. The spread of light i get from the IQ-X is perfect. It's bright without blinding people, keeps me visible from the side and stays on when I stop at intersections. It's not complicated and does exactly what I want it to do. I'm scheming on how to put this set up on all my bikes. (Posted on 1/25/2018)
such a wide, bright beam!Review by Karl
I installed this light on my Brompton, and liked it so much I bought another one for my cargo bike! It's currently the brightest dynamo-powered light available, and the beam pattern is very wide and well-shaped. I used the provided multi-joint bracket on my Big Dummy, but it was easy to substitute the Brompton wire-form headlight bracket to fit it perfectly under the front luggage on the Brompton. The mounting band can be inverted to suspend the light beneath a front rack without affecting the beam pattern or rain-proof construction.

Wiring was simple; the power wire is permanently attached to the light and the taillight wire is a short pigtail terminated with 2.8mm male spade connectors. This light works with almost any dynamo taillight; I paired it with a B&M Toplight Line Small on my Big Dummy and a fender-mounted B&M Secula on my Brompton.

If you're looking for a powerful headlight without lots of confusing modes or add-ons, this is the light for you!

Karl ➣ Perennial Cycle Inventor/Mechanic (Posted on 11/9/2017)

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