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Powerful LEDs block bike computer signal

A few months ago I funded a Kickstarter project for some bike lights called Orfos Flares. http://www.orfos.bike/ They are designed to be very powerful and give excellent side visibility (which is something I was concerned about having been pranged from the side on my bike by someone overshooting a t-junction. I was okay except for bruises and what looks like a Nike swoosh now scarred on my hip, my bike was okay too, but my front wheel could do with a truing. It was quite slow speed; I had time to say 'Oh, God d**n it' which was not sufficiently Anglo-Saxon for the situation and overly restrained.) So they arrived in March after the usual Kickstarter production delays (supposed to be December...)

The lights were indeed powerful and visible. They do run out after a weeks riding at least an hour a day, but they do pulse to let you know they are running low, and they have USB charging, which is much better than batteries for power and no running out of Duracells. The one button function is overly sensitive between flashing mode and brightness and a bit tricky to distinguish how long to press when it comes down to fractions of a second duration pressing.

One big bug bear is the mountings, they use magnets which can only really be mounted vertically on the stem and seat post. I had to rearrange all my cables to stop the brake and/or gear cable knocking off the front light as it would push the light from the side, twisting it off, as you would do with your hand. Having fixed the cables I still used some clear stickytape just to be certain. The magnets are held on with cable ties which is not a very good finish for an expensive light. A proper old fashioned plastic mount with slot would give me more confidence that they wouldn't get knocked off, or ripped of by a scally behind me.

The lights are defuse and bright enough to make good daylight running lights. I find the biggest risk to me are the aforementioned trundlers, poking their bonnets out of side streets forcing me to swerve out or brake suddenly (please stop before the line) and a front light helps. So I used the lights a lot for a few weeks until the clocks went back.

When it started to get brighter I was riding in daylight in the evening too, but thought I would keep using the lights just for that added feeling of safety they were giving me (real or not.) However the front light seemed to be interfering with my bike computer's signal. I was starting to want to check my pace in the light and go a bit fast for training purposes. Without a speedo it is very easy just to ease off all the time. This was especially annoying on a weekend where it might be light most of the way, but getting dark when I was coming home. I was stuck with an either/or situation.

I had recently upgraded, or just updated my Pro computer to a VDO one as the signal was poor and kept cutting out giving my speed as zero. The sensor was just worn out with mud and water, no matter how much cleaning, tape and new batteries I threw at it. I was pleased with another quick wiggle upgrade until the lights arrived.

So now I exist in a world of fuzzy data or compromising on when I use the safety kit I paid a lot of money for. I suppose I can buy annnutha computer with a good old fashioned wire. Has anyone else experienced similar issues; the computer works fine when the light is off, so it is not the magnet mounts. I can only guess the lights also put out near infrared and the computer also uses this. 'Don't cross the streams' as they say. I have tried the sensor on the back wheel and it is to far from the computer as well. Many cableties later I can't get them to work together.

Sorry if it is too long and unclear if this is a lights review or an appeal for help. Maybe it is just whining; the expensive toys I bought didn't work perfectly, so I have to buy more. #bikerproblems

If you're new please join in and if you have questions pop them below and the forum regulars will answer as best we can.

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4 comments

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Fish_n_Chips | 9 years ago
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Wave interference? From a light?

Can you cook with it?!

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Leviathan | 9 years ago
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Yes it is CE marked, but yes from the US. Guessing no-one else has particularly had this problem. (why does it say two comments but show only one, I though you couldn't delete comments?)

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Brown dog | 9 years ago
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All electronic equipment must be in complience with EMC regulations which applies to both sides of the pond.

Testing for EMC interference is not that easy or cheap due to the expertise and equipment needed

I would think there is a fault that is causing the problem , could you test your lights on another computer ?

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Flying Scot | 9 years ago
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Have these lights been tested under the EMC directive and CE marked?

Probably not by the sounds of it, they are from the USA?

Sounds like excessive electromagnetic noise from the driver.

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