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Old 01-08-09, 06:20 AM   #1
coquearaujo
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Dynohubs: waht about tail lights?

I've been reading lots of stuf about lights and dynohubs on this forum and on Peter Bicycles (thank you guys) and i'm going to purchase a DH-3D70 Shimano hub (for discs) and a LUMOTEC IQ Cyo R headlight.

But, what about tails lights? what's the best thing available to use with the IQ Cyo and the dynohub?, I've read about some that have an small battery and are on even some minutes after the bike is stopped...

Thanks again and my apologies for my bad english.
Coque
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Old 01-08-09, 07:21 AM   #2
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Cheers and welcome to the Forums.

Consider one of the Busch & Mueller's various D'Toplight versions. You can buy one with standlight (stays on for a couple of minutes even when you're standing still) or light sensor (automatically switches on in the dark, useful in underpasses for example) or both. Your front light by the way is made in similar different versions, but I don't know how well the various models are available to you. For details, see the Busch & Mueller web site at http://www.bumm.de

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Old 01-08-09, 07:27 AM   #3
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(and I'm moving this thread from Commuting to Electronics etc. Carry on.)

--Juha, a Forum Mod this time
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Old 01-08-09, 07:28 AM   #4
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I'm a huge fan of Supernova lighting, and they have a wired 3-LED tail light with standlight feature (stays on for a few minutes after you stop) for around $70. It's 180-degree visible and amazingly bright.
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Old 01-08-09, 08:55 AM   #5
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I have a B&M D'Toplight XS and I like it pretty well, although it's certainly not as bright as my Planet Bike Superflash. Also, I don't think there are dyno taillights that blink, so if you think that makes you more visible, that's something to consider. You can use both, of course; a bright blinky for visibility plus a steady dyno that never runs out of juice. I personally think that a steady light is less confusing for motorists, although perhaps less attention-getting.
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Old 01-08-09, 11:09 AM   #6
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I use the DToplight XS without problem, very visible, works with my IQ Fly Senso Plus, very nice little combo. Not as bright or flashy as the PB SuperFlash, but much more convenient and secure.

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Old 01-08-09, 12:08 PM   #7
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My co-worker has the battery operated version of the Dtoplight and got it from Peter White. It has nice side visability as well as very descent rear visability. The auto-on with motion detect is nice. The main difference between this and the SuperFlash is that the DToplight also have an nice large reflector built in. For top rear viability it is nice to have both active and passive items to help you be visable. I allready user two rear lights and have two standard reflectors as well mounted on my rack. One light is a basic 5 LED rear light, the other is the SuperFlash. Next year I'd like to swap out the basic rear light and replace it with the Dtoplight. I might get the wired one as I already has a dyno-hub with DLumotec LED head light. Sadly the then new IQ Fly was not yet shipping. Now I hear there is a light that puts the IQ Fly to shame... Therefore I'd also like to upgrade my main light next year as the DLumotec is OK, but I can always use more light.

Even through the DToplight is good and has a large reflector, I'd still want to add an additional SuperFlash for even better visability. The SuperFlash is fantasticly bright, but has somewhat limited side visability. This combo should provide superb rear lighting at a reasonable cost.

Happy riding,
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Old 01-08-09, 12:19 PM   #8
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I just use a battery operated taillight. It operates for well over a hundred hours on 2 AAA batteries and no wire to run between the dynamo and the rear of the bike.
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Old 01-08-09, 02:20 PM   #9
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The wire is an issue -- that's a long way from the hub to the back. Lack of flashers puts me off . I would like a rear light powered by the dyno though.
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Old 01-08-09, 07:10 PM   #10
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Don't let the lack of flashing put you off. Like others have said, you can always get another light and mount it to the seatpost or part of the rack (Planet Bike sells mounts that fit the small-diameter tubing on racks).

And, to be honest, they're quite visible lights already. I've seen enough of them on German streets.

I bought an D'Lumotec Oval Plus Senso LED headlight and a Selectra Plus taillight. I'm not sure if the Selectra is available in the States, but it's slick -- it has a standlight and two side LEDs. The main LED is red, too, not washed out like you see in that pic.

The wiring is no big deal, either. The shop gave me a length of wire with plugs on one end, long enough to go from the handlebars (if I wanted; I mounted my headlight on the fork crown), down the downtube, along a chainstay, and up a rack tube. Took less than ten minutes to install, including bolting the light to the rack; maybe 20 minutes total, including the headlight.

So, anyway, I'd say to get a taillight and run it off the dynohub. There's not enough reason not to, and it'll just use free energy.
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Old 01-09-09, 12:36 AM   #11
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I've been very happy with my DToplight XS. Slightly brighter than the Spanninga single LED tail-light that it replaced and it always works. Nearly as bright as the superflash, but also has a built-in reflector.
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Old 01-09-09, 05:44 AM   #12
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I just use a battery operated taillight. It operates for well over a hundred hours on 2 AAA batteries and no wire to run between the dynamo and the rear of the bike.
+1 Use the dyno for the front, and just get 2 PBSF for the back. You don't have to mess with all of those extra wires and the batteries on the back last a long long time.
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Old 01-12-09, 05:22 AM   #13
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+1 Use the dyno for the front, and just get 2 PBSF for the back. You don't have to mess with all of those extra wires and the batteries on the back last a long long time.
Having battery operated rear light(s) provides more light and better visibility, especially if combined with proper reflectors. It also allows you to put all the 3 watts from the dynamo to the front light (assuming you can upgrade the bulb to 3W), giving marginally more light there too. But what I personally most like about dynohubs/dynamos is you don't have to worry about batteries. At all.

Messing with extra wires is a small one time effort, if done properly. Messing with the 4 AAs of 2 SuperFlashes can get boring, especially in the winter.

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Old 01-12-09, 12:11 PM   #14
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PBSF is not as bright as my homemade wired 3 watt red emitter. It's really cheap to do a rear light because you don't even need optics to focus the light.
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Old 01-12-09, 11:09 PM   #15
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PBSF is not as bright as my homemade wired 3 watt red emitter. It's really cheap to do a rear light because you don't even need optics to focus the light.
which emitter are you using?
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Old 01-12-09, 11:12 PM   #16
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Reelights might be a cheap-ish alternative on the rear.
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Old 01-13-09, 12:19 PM   #17
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which emitter are you using?
This one.

http://www.ledsupply.com/lxhl-lh3c.php
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Old 01-13-09, 01:48 PM   #18
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I use the dtoplight in the rear powered from the dyno, but I ALSO use a Dinotte rear light on pulse. The Dtoplight is mostly as a backup in case my battery dies or something like that.
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Old 01-20-09, 06:50 AM   #19
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Thanks for all the resplies guys, i think i'll go with the DH-3D70 hub, a "Cyo R" headlight (i like the fact that it focuses some light just in front of the front wheel) and a D'TOPLIGHT XS or a TOPLIGHT FLAT PLUS as a tail light.

If i find that the taillight is not enought, i'll add a reelight tail light since what i want is to forget about charging batteries and mounting the lights my the bike.

I'll give you my feedback.

Thanks again.
Coque.
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Old 02-06-09, 03:17 PM   #20
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I've got question for you guys:

Does anyone ever have issues with the security of your Dynamo Head or Tail light? That's the last thing that's keeping me from opting for a battery powered system that I can throw in my bag and take with me. I'll be using this commuter for grocery runs and two night classes at a local college. Once mounted, are these lights easy to grab and run with or are they pretty secure?
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Old 02-06-09, 04:33 PM   #21
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I don't think that security will be a problem (knock on wood! ). They don't make these lights with quick releases, so a thief would have to have tools to remove them.
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Old 02-06-09, 10:03 PM   #22
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1. Are the Cyo R lights available yet? P. White says comming soon (Nov 08?) and hasn`t yet changed his site to say they`re in. I see Cyo 60 on some European vendors` sites, but I think that`s the long throw one.

2. Is there a "clean" way to wire a tail light on a fender? I mounted one a few months ago and never wired it because I didn`t like anything I came up with. Since then it`s just been getting a free ride and I`ve been using the old light (battery D Toplight) on my rack.
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Old 02-06-09, 10:21 PM   #23
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2. Is there a "clean" way to wire a tail light on a fender?
You can run the wire/s up the inside of the fender
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Old 02-06-09, 11:40 PM   #24
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2. Is there a "clean" way to wire a tail light on a fender? I mounted one a few months ago and never wired it because I didn`t like anything I came up with.
Some types of chromoplastic guards (these are laminated - two layers of fairly tough plastic with a layer of foil between them) have a striped appearance, these stripes are actually strips of foil with gaps.

In the past I've used these foil stripes (in an ESGE guard) to power a rear lamp, though I think the lamp was actually designed to be able to do so, IIRC the rear light was also made by ESGE.

This was using a bottle dynamo which is a single wire (frame earth) system anyway - where you only have one wire to 'lose' to give you an appparently wire free install.

Might be a bit trickier on a dynohub.

And of course you need the right type of mudguard....
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Old 02-06-09, 11:50 PM   #25
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Does anyone ever have issues with the security of your Dynamo Head or Tail light? ..... Once mounted, are these lights easy to grab and run with or are they pretty secure?

I have been running a Inoled 10+ head-light and DT Stoplight tail-light for several years in two big cities with relatively high crime rates. I have everything bolted down well with the standard halters from Peter White and also have wrapped a little cosmetically ugly electrical tape around the back of the head-light to "mess it up" a bit.

Have had no troubles at all with theft. Theses wired lights look a little odd and once you have a little tape on them, it isn't at all obvious how to take them off easily. Maybe the thieves are going for the easier pickings of smaller lights.

My wife has been running the same system and has also had no troubles with theft, except twice near a big crowded parking area, the wires to the headlight were vandalized. Strange but true..


p.s. Coque, it was quite easy to run a wire back from the head-light to power the tail-light. I really like never having to worry about recharging any batteries.
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