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RRP £145.00
Busch&Muller Lumotec IQ2 Luxos U 70 Lux
Busch & Muller Lights & Mirrors : Front Lights For Hub Dynamos
Busch&Muller             Lumotec IQ2 Luxos U 70 Lux - Click to enlarge.
Latest Cable (Sept 14) - Click to enlarge. Handlebar switch - Click to enlarge. With reflector - Click to enlarge.

Specification

Available in:
  • Lumotec IQ2 Luxos U 70 Lux
Description
    The LUXOS U is Busch & Muller's premium light IQ2 technology with a combined light and reflector which has a light field twice as wide as previous LED head lights. The LUXOS illuminates an area that is several times larger with maximal homogeneous output. In Busch and Mullers own words: 'So wide, so far, so pristinely bright'

    The new light provides a very wide range of light, both in front of the bicycle and to the sides extending beyond the edges of the road and over 30 meters in front of the bicycle thanks to the additional LEDs which are managed electronically

    The Licht24 daytime running light has signalling LEDs shining brightly forwards. A sensor automatically switches between day and night mode

    The integrated buffer battery suppling the charging current to the USB port and powers the flood and parking light functions. To fully charge the backup battery, you require 20 minutes at a speed above 17 km/h without a USB device connected and with lights switched off. The Luxos is then optimally prepared for operating/charging a USB device within its capabilities

    The Luxos U is not comparable with a normal mains charger for mobile devices, it supplies devices with power. currently this may suffice for charging applications at high current loads, sometimes it is just enough to slow down the battery use. The higher the speed the more charging current is potentially available. At slow speeds, the buffer battery in charging mode cannot recharge because only limited energy is available from the dynamo (about 3 W at a speed of 15 km/h). Some mobile phones however, use up to 5W. This means that the cache battery is charged first, without that no power is supplied via the USB output. Once a certain state of charge is reached, the output will switch to the USB. If the mobile phone empties the battery, the power supply to the USB output is switched off at its minimum charge level and the buffer battery only is recharged. With these breaks in charging some USB devices indicate with the 'start of charging' sound

    We recommend buying the Luxos U from a bike shop where you can try your device to minimise exchanges if your device will not charge. If your primary use is to be the charging of mobile devices, we recommend the E-WERK. This device has no integrated buffer battery, which functions as a lock and generally a higher wattage is available than the Luxos U

    For use with hub dynamos only
Key Features
  • 70 or 90 Lux output
  • 90 Lux flood light
  • Licht24 Daytime running light
  • USB devise charging option
  • Panorma light at close range
  • Handlebar control push button
  • Cache battery
  • Automatic sensor
  • Rear light monitoring
  • Standlight
How To Recognise A Good Head Light
    Illumination levels of headlights can be measured using different units - e.g. Lux or Lumen. B&M states the light output of headlights using the unit Lux. A Lux value provides the illumination level in relation to its distance from the light source. It is exactly this relation which is a deciding factor when considering a headlight, because it states the amount of light on the road. The value Lumen in turn states how much light exits the headlight at the light source, no matter if the light shines onto the road or is lost as stray light. That is why this value as excellent as it might sound can be very misleading

    However even the Lux value provides only partial information about the out put of a headlight. Also important is the quality of the light field which is created on the road. Its width and depth; its light quality that is both homogenous as well as comfortable to look at with the human eye and its Lux values does not say it all. And finally its glare free light/dark boundary are all qualities that cannot be stated using just measured data. What is important is how and what the rider can see for safer more comfortable riding

    It is notable that some manufacturers cite "visibility from x metres" as a means of evaluating headlamp quality, a rather meaningless value. There is no objective measuring method and the safety gain is only an individually perceived factor because it implies ideal conditions (i.e. no interfering light, "clean" air, unhindered visibility, universally identical abilities of human eyesight ...) that in reality do not exist. That is why B&M forgoes quoting a value that they consider useless and that only feigns objectivity. The most relevant question is this: Is there any real value in being seen from a distance of 1000 metres?
B&M Day Light Running Mode
    Daytime Running Light. Better Seeing And Being Seen

    For bicycles which are less conspicuous in traffic by nature a daytime running light is a substantial advantage. LICHT24, the daytime running light from B&M is the ideal solution. Additional signalling LEDs shine upwards and generate maximum visibility. The "regular" riding light is focused on the road and limited by its clearly defined light/ dark boundary to prevent glaring oncoming traffic.

    When a headlight with LICHT24 is switched on it will always shine: during day and night. LICHT24 has a day mode and a night mode. As soon as the integrated sensor is activated, it switches automatically between both modes. LICHT24 is approved by the German road traffic regulations. The day mode may also be used at night because the main LED is always active
Light At Close Range
    For a secure ride it is important to be able to see the road directly in front of the bicycle. Bumps or potholes in the road can be seen better if this area is lit and can be circumnavigated by short and intuitive steering. During darkness this is only possible if the area between one and four metres in front of the bicycle is lit brightly and homogenously. Subjectively the need for light at close range is higher the slower one is riding, because one's balance can more easily be influenced by obstacles. "With light at close range" means that the light field emitted by the B&M headlights starts directly one metre in front of the bicycle
IQ Technology
    IQ Technology: The Light Revolution

    The core of IQ-TEC is the revolutionary idea not to use a high output LED as an indirect light source. The complete reflective surface is used to focus and guide the light. If one looks into the reflector of an IQ headlight one only sees the metalised surface. Once the headlight is turned on what takes its place is "nothing but light". Since 2007, B7Ms innovation has continually been developed further.

    Conventional technology: A light source sits in the centre of the reflector. The result: stray light and loss of efficiency.

    B&M have developed state of the art technology called "IQ2 TEC" and "IQ-TEC PREMIUM". In comparison with the first IQ generations, the new IQ-TEC versions offer double the light output and an almost twice as wide, very extensive field of light. Everybody who has cycled with an IQ TEC headlight at night will never again want to do without this light experience
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