Dynamo Lights

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  • Only works through a dyno USB charger also ^^

  • Flashing light is good for noticing the rider but it’s very difficult to understand there distance and speed. Constant or pulsing is “safer”.

  • This was all covered when I first asked. Tbh I won't believe its safer until I see some proper studies or data

  • Yes, and

    flashing is just annoying

  • Sorry I missed that.

    You ever tried looking at a flashing light?

    I don’t need any data or studies to tell me it’s a lot easier to see where a constant light is over a flashing one.

  • Redid the wiring on my girlfriend's bike today.

    After many attemps at bodging it somewhere, today was the day I think it's all going to work forever.

    Featuring a 3d printed mount for the rear light. Nothing special though, and need my mate to print a mudguard mount instead.

  • £50 for a 3d printed led enclosure? Bad product is bad

  • Has anybody mounted a SON rear light vertically like this?

    SON say you shouldn't do it because of the beam angles but I can't find any photos actually showing the light pattern.

    Is a SON Rear Light mounted vertically permitted?
    No. The SON Rear Light has very wide but not very high beam angles. When mounted vertically this would be vice versa resulting in poor visibility from diagonal back.

  • It'll work no problem, but as they say you'll be spreading the light up and down and to the right or left (depending which way you mount). This will be instead of across the road latterally and down.

    I have done what you are suggesting with a Supernova rack mount light and it has worked fine, however that does have slightly different optics.

    While the location for mounting is tidy, it is not great if riding in heavy traffic as it is so low. Up closer to the top of the wheel (mudguard mounted) or seat tube is better.
    I ended up changing to a seattube supernova light and mounted it on an extended barrell bolt on my Thomson seatpost clamp made by August Cycles.

  • This is how mine is mounted as didn't have anywhere else to mount it with being a short ass and having a saddle bag preventing the usual spots.
    Mind I do also use a battery powered light clipped to my carridice bag.
    Do hold out finding alternatives that get it higher and horizontal.
    Will see if I can take a picture how it looks from behind.

  • Thanks for the replies, I think eventually I'm going to get a saddle bag support / rack so it could go on there. I should probably wait until I've got my bag and rack set up finalised before worrying about the light.

  • You can get a clip from B&M that mounts to the saddle rail and sits on back of saddle.
    https://www.sjscycles.co.uk/lighting-spares/busch-muller-rear-light-saddle-mount-adapter-50-mm/

    I'm in the process of designing a 3D printed mount for the rear of a Gilles Berthoud saddles (which have two threaded holes on the backplate) which gets it nice and high, and not in the way of a saddle bag if that is on the rails.

  • I like having my rear light down by the dropout - it means it shines on the road and creates a pool of light (even more effective in wet weather) which I feel is more visible than a light mounted higher up. Also makes cable routing a bit more discreet, either along the rear derailleur or brake cable, depend on which country you're in.

  • Problem is from a distance that light wont be seen as easily as most of it is getting thrown into a dark surfaced road, so the amount of reflected light out to the drivers is a lot less than the output of the light.

  • That's the problem with that one linked, it's no good if carrying a saddle bag. And if not carrying a bag you may as well get the seat post version.

  • And if you have a carradice type bag, that also often blocks the light if your frame isn't large.

    THat is why on my Isen I went with the son mudguard mounted option and have been really happy. Wiring is nice and tidy inside fender with gorilla tape, then into frame at BB.

    On my other bike I solved this like this

    The SON seatpost mount light is very nice and does a similar job, but is expensive.

  • If you run mudguards all the time that's another good option.
    That supernova mount is neat.

  • Wouldnt recommend, there are brackets like that, that mount it horizontally - maybe velo orange? pretty sure I sure it on practicalbikes?

  • Pretty sure you sure it, you sure about that?

    Yeah VO sells a couple different sizes, their made by some company on the West Coast of The US.

  • I used the small version of that bracket to mount the rack mount light down by the axle on the rear wheel, but it mounts it in the vertical orientation.

    As it says the long version can be mounted behind the rear brake caliper hole. If the bridge is drilled from the bottom for mudguard mounting you could use the small one. I probably could sell mine if that is what you needed.

  • Ha. Not I’m not sure!

  • Not the ones I’m thinking of, I have seen one to hold the light correctly horizontal

  • Did you scroll they the pics? There is a horizontal option.

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Dynamo Lights

Posted by Avatar for hugo7 @hugo7

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