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For Busch & Muller Lumotec IQ Cyo, 32 customer reviews collected from 2 e-commerce sites, and the average score is 4.2.

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2.10.2013

First thing to say is the description is not exactly the product you receive, this is the Lumotec IQ Cyo N Plus. Not that I am complaining, it's a great product, but I only got lucky finding this on amazon, it never would have appeared on shopping searches on google. Another good thing is that the actual light I received is slightly better than the description, it is in fact 70 Lux. I have nothing to compare to but if that means its 15% brighter than the previous model then all to the good.Now to the setup of the light. I have a winter road bike with caliper brakes so the first thing you need in that set up is a different bracket to attach to the bike. The bracket the light comes with is for Cantilver brakes.Search the internet and you will find a B&M bracket for caliper brakes, but even better for me was the SON bracket for attaching to handlebars which works perfectly well with this product. So the light position is much higher than otherwise would have been, which is good for me as my riding is on hedge lines roads, a higher light means more safety, more likely to be seen by oncoming traffic. I am running a Shimano Dynamo Hub on Exal TX19 rims with this. I taped up the connectors for the rear light, not needed for me, I have a battery powered cateye for that. Schoolboy error I taped the ends together doing that and short circuited things so nothing worked until I separated them with tape. Next up the main cable taped to brake cables and fork down to the connection, shortening the cable only a touch to fit. All up and running. The 19mm rims needed a wider tyre, 28mm gatorskins, then the wheel was good to go.Performance. There is no noticable drag at all. The drag I believe I am getting on this now is the extra weight, the wheel is heavier than my regular wheel, the tyres and inner tube are heavier too, so I estimate my bike weight has increased by at least 600g maybe more. It's a winter bike and it's not all about speed in winter. I found my average speed dropped on my first ride out, from about 18 mph to 16.5 mph. I was happy with that expecting to be struggling to maintain 16 mph.The light produces effectively two beams from the way it reflects inside the unit I guess? Immediately in front of you its a nice wide beam, illuminating the width of the road. Then as this falls away a longer square shaped beam projects out about 40+ ft in front. It's plenty bright enough to make traffic noticably reduce speed. It's also plenty bright enough to feel you can go the speed you want to, albeit as already mentioned you are going slower due to a heavier bike/wheel anyway. The standlight is fine, plenty of light for junctions but thats all its there for. I will be carrying a powerful head torch for if a puncture happens, the standlight is only good for about 4 minutes really. My first ride hit a rain shower, not really heavy but enough to know the light and contacts were completely untroubled by this.Aesthetics: I am adding this because I was so pleasantly surprised to see how small the light is. Even though other reviewers have said the same you really don't appreciate it until you see it. The light itself is the one thing not adding any weight in my setup. It's so small and neat and you forget all about it.Last thoughts: Take it for a little test ride round the block to get the height right, take a torch with you and the right allen key or spanner and adjust until you are happy. Then you are set to do a proper ride. If you are buying a new wheel with tht dynamo hub to go with this don't make my mistake and try to put the wrong tyre on. In the end I only lost a couple of days waiting for the right tyre to arrive in the post. There is good information on Sheldon Brown about the right tyre to go with the wheel you have for this.
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4.4.2012

Jeez, how much searching on the internet did I do to eventually find the right light to fix onto my Shimano dynamo hub?! It wasn't until a friend suggested this brand to me that I actually found anything constructive - but this may actually just be my lack of internet searching skills!!! Anyway, I was a bit a reluctant to part with £70 for a light, but I grasped the nettle and am so glad that I did. When I received the packaged (in less than 48 hours, I may add) I was quite surprised by how small it actually is - about 3cm across the lens. Fixing the unit the hub was a doddle, even for a complete and utter muppet like me, and I was up and running in less than ten minutes...Make sure that you have three small zip ties to fix the cable to your fork.And other than an allan key and a small adjustable spanner, no tools are neededThe first time I rode with this light I was just amazed at it. The best I describe the throw of the unit's light is one large central square, with two slight smaller squares wither side. If you focus the main beam about seven metres from your front wheel you'll find that it illuminates the whole nearside lane in a brilliant white light that allows you travel as fast your legs will pedal. There is absolutely none of the reluctance to travel at speed that you experience from lesser lights. As for the rest of the main central beam, it fades away into the far distance and will light up road signs at about two hundred metres away. The two 'squares' either side of the main beam are slightly less bright but serve to illuminate the nearside verge and signposts, whilst the other beam casts a glow right across to the offside verge. There's also a little lip on top of the light that eliminates any loss of night vision. Oh, and it's that good that on-coming vehicles actually dip their headlights for you - something that I never used to experience with a battery powered Cateye...The on and off switch are easy to reach whilst riding, and there is a stand-light that will run well after you've stopped pedalling....Erm, what else to say? Oh, and the other thing thing in relation to this light and a dynamo is that there is no maximum burn time, no re-charging and no having purchase and discarb batteries. I really cannot understand why dynamo lights are not more come in the UK!!!!!In short, if you're looking for a dynamo light, buy this one! It's brilliant
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10.3.2011

After reading various reviews which nearly drove me silly, I finally chose the lower power 40 lumens with reflector version as opposed to the non refector 60 lumens version. Why? well if the Germans demand a reflector there must be a good reason.Secondly my existing halogen light gives out 17 lumens & I`ve always thought it was quite a good, bright light so 40 lumens would be brilliant by comparison. Thirdly there was talk of a dead spot immediately in front of the bike for about 2 metres with the 60 lumens version.I went out for a trial run on a mixture of roads. Obviously on lighted main roads you couldn`t notice much difference. A section of unlit main road was amazing.with the centre of the main focus about 20 - 30 feet (approx 7-9meters)ahead the road was well illuminated, and both verges were clearly visible. Moving onto small country lanes, the whole lane was well lit up, but possibly the most illuminating (sorry that was a pun just waiting to happen) part came whilst passing a farm - muddy road, standing water, gravel & potholes were all easily visible. I came home & told my wife that it gave as good a beam as the old 6volt VW Beetle headlight on dipped beam! This comes highly recommended, & hopefully will shine my path to qualifying for Paris Brest Paris this year, if only I could buy a gizmo that would make the rest of me work as well as the light!Just one final point, the electronics in the light interfere with wireless computers so I have found it necessay to buy a wired Cateye Strada, which seems to work OK.
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26.12.2013

I have two of these lights, both bought from Amazon, for two bikes,and I would recommend them very highly. In fact I don't know of a better front light.I have recently bought the Busch & Muller Luxos B front light, to try it. It is more expensive and has 70 Lux compared with the 60 lux output of the Lumotec IQ Cyo sport. However, I would say that the Lumotec IQ Cyo sport is better, and I will buy another Lumotec Cyo next time.Why is the Lumotec Cyo better? The Luxos is very faint indeed when you are very slow or stopped. In fact you think that the light is off. Second it is difficult to to turn on the Luxos when you are riding. You press a button the back of the light which can push the light out of position.The Lumotec is easy to turn on. You turn the control on the back of the light. No great force is needed.The Lumotec Cyo is amazingly good when you are on a dark road. There are expert reviews by bike specialists that say the same thing, and you can find these on the internet. The thing is that the Lumotec puts the light on the road. There are other lights, some battery lights, which have an amazing brightness, but do not light the road ahead. That is what the expert reviewers say, and they are right. The Lumotec is highly rated by those in the know, and they are quite right, as I find each time that I use it on the bike. It is easy to operate and very efficient.I have been using the Lumotec Cyo for four years and I would recommend them very highly indeed.
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19.12.2015

This is a great light, it replaced (with a bought-separately new hub dynamo) a German spoke dynamo light which gave a comforting glow around the front of the bike on otherwise unlit country trails at night. The 'stand light' function is very welcome at the few T-junctions I have to wait cross major route traffic at. It's brighter than the halogen light it replaced but much more 'focussed' - the contrast between the lit and unlit part of the road means I find I have to choose between riding fast while remembering what's in the dark patch in front of the bike or riding slow with no advance warning of what's beyond the lit patch. I wouldn't go back to the soft glow of a halogen lamp,but I was very struck by this one subjective difference between the outgoing and replacement lamps!The mount is not at all appropriate for my bike. I twist mine through 90° and hold it on with the adjusting bolt for the front cantilever brakes. This kludge is far from ideal - it isn't totally secure so switching the lamp on and off usually knocks it off-centre and the extreme pitch of the mount interferes with the lugs on the on-off switch. I'd have no hesitation awarding this light 5 stars if it came out of the packaging and fixed properly to the bike.
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16.2.2020

I bought this after light after having to cycle home in the dark without lights on a few occasions as the batteries had died or had run out of charge.It was after watching a couple of YouTube videos I discovered these lights, and I’m glad I did. I never again have to worry about charging my lights overnight or at a computer in work or have some halfwit come along and unplug them.It’s not the brightest lights I’ve used but then those were the ones that died on a regular basis, but I have been flashed by cars traveling towards me due to the strength of beam, so it must be bright enough for the road. I also use it on an old railway line with out any lights and I get good visibility.It’s a steady stream of light rather than a flash,but I still have a small flashing LED light down my fork.I’ve also added a b&m rear light which is really bright and can be seen from a good distance behind.Overall I’d say it’s perfect for commuting, and taking away the worrying of ‘have I changed my lights’.
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21.1.2015

This B&M front light is the Premium version of the Cyo, with 80 Lux rather than the 60 of the standard Cyo. It incorporates both a standlight function and also a built in daytime running light (DRL) below the main lamp. A sensor switches the main light on when cycling during the hours of darkness. There is also a setting which keeps the DRL in use day and night if the main beam is not required. It was easy to fit, with one cable connecting to my hub dynamo and a supplied further cable which connects to the rear light. The beam is very bright and fully covers the road ahead in an even beam without dazzling oncoming cyclists or drivers. Highly recommended if you need a fit-and-forget,high quality front lamp without the nuisance of batteries.
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23.12.2012

The cost is excessive but I must admit that I was impressed by the performance. For dark country lanes this is a perfect front dynamo light. I was especially impressed by the beam pattern, some lights give a thin bright beam but this shares the light between just infront of the wheel with a sharp cutoff and a broad cone of light ahead.It is the best front light I have had but I still wonder if fitting 3 battery lights instead would have worked out cheaper and done as good a job. If it was cheaper then this would be a 5 stars.

7.3.2017

I bought this as new light for my wife's bike, I was installing a new wheel so went with a Shimano dynamo hub. It cost a bit more than I normally pay for a bike light, but I wanted something that would be waterproof since it would be a permanent fixture.The light works well there is a continuous running light for daytime use and the headlight is bright enough to illuminate the road ahead.The light remains on even when you stop cycling and seems to last a reasonable length of time.

31.12.2018

I purchased this to fit to my Brompton folding bike. The mounting bracket is sturdy but not compatible with the Brompton mount so a Brompton mounting bracket is required ( £4 from most cycling shops or Brompton direct.)I have it running on rechargeable batteries temporarily until a suitable Brompton dynamo wheel becomes available. 8x AA NiMH cells that I had lying around. Current measured at 450maGood light output and a pleasing beam pattern

30.1.2019

That is an excellent purchase:* very bright - illuminates the road and sides for tens of meters ahead. I have never seen a lamp that powerful in any bicycle I have seen.* very good beam shape - brightest in front of the rider, with very sharp light/dark boundary making it easy to setup properly to avoid glaring oncoming traffic* capacitor for parking light is very usefulCannot recommend enough.

23.5.2015

Quite literally brilliant - but came without any instructions, hence only four stars. I had to hunt them down on the B&M website: (www.bumm.de/fileadmin/user_upload/Anleitungen/175qt.pdf) I like it that you can turn the standlight off. Even better when paired up with a B&M Secula tail light but watch out that you get the polarity right.

24.4.2014

This is a good no nonsense light,seems to work well with my sp hub dynamo nicely and stays on when stationary but is still quite bright,other users noted it went quite dull when standing but this one seems ok.Bit annoying that it went down 20 pounds after buying it but that's life,more of a bargain now I suppose.

10.11.2012

This is a really good dynamo front light! I've got it hooked up with a Schmidt hub dynamo, and it's really bright & has a good beam spread. Mount is very solid and the whole assembly is pretty decent. The case isn't metal, (I thought from picture it was), but a decent plastic & still looks good.

19.1.2019

Easy to fit, replacing the standard Lyt model that came with my Brompton. High quality construction. Automatic switch on, and illuminates the road ahead very well. Ive even been told to dim it (which you can't) as it was too bright for oncoming cars. Tough. Be Seen. Be alive.
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