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Old 06-24-08, 02:23 AM   #1
Ziemas
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New Bike Specific Light - 128 lumens - 6 hours - $76!

This new light looks quite promising. It's bright at 128 lumens, takes AA batteries, and has a long runtime of 6 hours and a battery guage. Has anyone heard of this before?

https://www.fenix-store.com/product_...roducts_id=486



EDIT: It's a Dosun M1 Bike Light.

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Old 06-24-08, 06:35 AM   #2
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Man, the finish on that product makes it looke like a $2 flashlight.
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Old 06-24-08, 06:58 AM   #3
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Man, the finish on that product makes it looke like a $2 flashlight.
Oh, you've seen the light. Can you tell us more about it please? Thanks.
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Old 06-24-08, 07:35 AM   #4
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128 Lumen is not really all that bright compared to the new power LED's. Thats less than a Cree XR-E operating at the lowest power setting of 10% when using a standard 5-mode driver circuit. My dynamo powered DIY LED headlight produces 500 Lumen at 7 MPH. You would do much better with a Cree or SSC flashlight from DX. They have flashlights with the new SSC P7 emitter producing 900 Lumen for ~$50.
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Old 06-24-08, 09:05 AM   #5
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they need a better video. Looks kinda big...I wonder what kind of mount they have coming with it.
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Old 06-24-08, 09:07 AM   #6
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Originally Posted by n4zou View Post
128 Lumen is not really all that bright compared to the new power LED's. Thats less than a Cree XR-E operating at the lowest power setting of 10% when using a standard 5-mode driver circuit. My dynamo powered DIY LED headlight produces 500 Lumen at 7 MPH. You would do much better with a Cree or SSC flashlight from DX. They have flashlights with the new SSC P7 emitter producing 900 Lumen for ~$50.
Jaa, with a 30 minute runtime.

128 lumens for 6 hours is good for a city commuter light.
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Old 06-24-08, 02:52 PM   #7
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Yeah, its significantly brighter than most bike lights out on the street, and looks like a useful beam pattern. Runtime means you'll change batteries once a week rather than every day.
I like it.
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Old 06-24-08, 03:27 PM   #8
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More lumens don't necessarily make a better bike light. Effective power management, bi-level beam pattern and cut-off shielding combined with a decent lighting level makes this a pretty special combination. How many DIY, chicken-frying-lumen output headlights have these features?
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Old 06-24-08, 04:23 PM   #9
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More lumens don't necessarily make a better bike light. Effective power management, bi-level beam pattern and cut-off shielding combined with a decent lighting level makes this a pretty special combination. How many DIY, chicken-frying-lumen output headlights have these features?
This one.

Two SSC P4 U-BIN Z-power LED's under Fraen optics. 10 degree narrow left and 15X30 elliptical right. Bridge rectifier and 1,000uF capacitor is also located in the housing. No batteries required as it's driven by the dynamo.

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Old 06-24-08, 05:39 PM   #10
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The background music in the video will be stuck in my head for the rest of the day now...

I like the concept, but two things are keeping me from buying it. The lack of information on the mount, and the fact that it is 128 lumens. If it was a tad brighter, say in the 200 lumen range, I'd be all over it to replace my fenix lights. I really want something self contained, with good brightness, a solid beam pattern for biking, and good runtime, say in the 3 hour range. This is close, but not quite there.

That said, I'll probably grab one next week and see how tinker friendly this light is.

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Old 06-24-08, 07:06 PM   #11
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More lumens don't necessarily make a better bike light. Effective power management, bi-level beam pattern and cut-off shielding combined with a decent lighting level makes this a pretty special combination. How many DIY, chicken-frying-lumen output headlights have these features?
There is something funky about the beam pattern of the light in the video. Unless there is another light mounted somewhere on the bike, the pool of light right below the wheel is absolutely useless. Illuminating where the wheel is gives you no information about what your wheel might be falling into. By the time you could see a hazard with a pool of light directly in front of the wheel, it's too late.

I'm not sure who this light is designed for. The Planet Bike 1W Blaze puts out as much light, is $30 cheaper, is smaller and has a 7 hr run time on AA batteries. If they are aim the light towards the crowd that needs longer run times, the light is too weak.

'Tis a silly light.
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Old 06-24-08, 08:07 PM   #12
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The background music in the video will be stuck in my head for the rest of the day now...

I like the concept, but two things are keeping me from buying it. The lack of information on the mount, and the fact that it is 128 lumens. If it was a tad brighter, say in the 200 lumen range, I'd be all over it to replace my fenix lights. I really want something self contained, with good brightness, a solid beam pattern for biking, and good runtime, say in the 3 hour range. This is close, but not quite there.

That said, I'll probably grab one next week and see how tinker friendly this light is.

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Old 06-24-08, 10:02 PM   #13
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Originally Posted by n4zou View Post
This one.

Two SSC P4 U-BIN Z-power LED's under Fraen optics. 10 degree narrow left and 15X30 elliptical right. Bridge rectifier and 1,000uF capacitor is also located in the housing. No batteries required as it's driven by the dynamo.
I know you are proud of your homemade light, but must you post it in nearly every light thread? You DIY and the light in the OP have for very different purposes. Please try and accept that not everyone has the same lighting needs as you.

Thanks.


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Old 06-24-08, 10:04 PM   #14
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they need a better video. Looks kinda big...I wonder what kind of mount they have coming with it.
I wrote to Fenix-Store about the mount. I'll post when I get a response.
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Old 06-24-08, 10:15 PM   #15
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I'm not sure who this light is designed for. The Planet Bike 1W Blaze puts out as much light, is $30 cheaper, is smaller and has a 7 hr run time on AA batteries. If they are aim the light towards the crowd that needs longer run times, the light is too weak.

'Tis a silly light.
The Planet Bike 1W Blaze has a Luxeon LED in it which puts out a maximum of 45 lumens. That's a far cry from the claimed 128 of the light in the OP.
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Old 06-24-08, 10:40 PM   #16
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The beam in the video does not seem too bad for what is basically a cute little flashlight. I'd aim it a little higher so cars could see it better but then the narrow patch on the road would make it harder to see road hazards. I'll stay with my DIY system even though I need a battery that could start a small motorcycle.
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Old 06-25-08, 12:15 AM   #17
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Dinotte 200L
Stop shillin' Dinottes. The extra battery pack is a nuisance to deal with, and yes, I have dealt with velcro strap battery packs. Not fun. I prefer a simple mount and go.
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Old 06-25-08, 12:18 AM   #18
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Originally Posted by n4zou View Post
128 Lumen is not really all that bright compared to the new power LED's. Thats less than a Cree XR-E operating at the lowest power setting of 10% when using a standard 5-mode driver circuit. My dynamo powered DIY LED headlight produces 500 Lumen at 7 MPH. You would do much better with a Cree or SSC flashlight from DX. They have flashlights with the new SSC P7 emitter producing 900 Lumen for ~$50.
Your dynamo does not produce 500 lumens at 7 MPH. Stop exaggerating. I'm a DIY freak as well, but not everyone is capable of DIY. You need to learn to accept that.
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Old 06-25-08, 01:05 AM   #19
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Originally Posted by cyccommute View Post
There is something funky about the beam pattern of the light in the video. Unless there is another light mounted somewhere on the bike, the pool of light right below the wheel is absolutely useless. Illuminating where the wheel is gives you no information about what your wheel might be falling into. By the time you could see a hazard with a pool of light directly in front of the wheel, it's too late.
I had a light setup that had almost no spill (pathetic dual 3w halogens), very unnerving when you need to stop in total darkness. I had to use a small blinky pointed down by the front wheel.
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Old 06-25-08, 02:34 AM   #20
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"Show it agant"? Is that what I saw in the video?

All your base are belong to us

LOL

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Old 06-25-08, 08:46 AM   #21
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Your dynamo does not produce 500 lumens at 7 MPH. Stop exaggerating. I'm a DIY freak as well, but not everyone is capable of DIY. You need to learn to accept that.
There are new people showing up all the time on this fo and most do not search the fo for prior posts. This would exclude them not only from my information but others as well. If I and others only posted once the fo would soon die from lack of use. Just because others can't DIY equipment should not limit information to those that can. I've had many private messages from others wanting more detailed information about my latest light. I'm also not exaggerating. My dynamo current output is 700mA with two power LED's in series and when used with high efficiency optics 500 Lumen is easily obtained. You can see this from the following graph available from SSC website.

Anyway, I was only responding to another comment about how DIY lighting could never be as good as commercially available lighting which is not true. In all reality DIY LED lighting is far ahead of manufacturers because of the extremely rapid pace of ever brighter LED's. It takes a lot of development time for a manufacturer to bring a new product to market. Currently Power LED's are in an extremely rapid development phase. An example is the jump from the Cree XR-E at 220 Lumen output (without optics) to the SSC P7 900 lumen (also without optics). The new SSC P7 with optics is so bright at full power it exceeds DOT limits for automotive headlight use.

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Old 06-25-08, 08:48 AM   #22
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^^^^

Please understand that other people have different wants and needs than you. Please.
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Old 06-25-08, 08:53 AM   #23
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I had a light setup that had almost no spill (pathetic dual 3w halogens), very unnerving when you need to stop in total darkness. I had to use a small blinky pointed down by the front wheel.
I'll agree that some light spill is needed but the (poor quality) video shows something else entirely. It looks like part of the beam is aimed directly at the front wheel. There also doesn't appear to be any light from there to where the main beam hits the ground. Of course, I'm used to the pavement smoking while I ride
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Old 06-25-08, 10:32 AM   #24
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There are new people showing up all the time on this fo and most do not search the fo for prior posts. This would exclude them not only from my information but others as well. If I and others only posted once the fo would soon die from lack of use. Just because others can't DIY equipment should not limit information to those that can. I've had many private messages from others wanting more detailed information about my latest light.
So what, I have DIY lights on this forum as well, and yet I don't see the need of harping it every time a new light thread shows up. The search is there for a reason. Those who go on DIY hardly gets it right the first time. Kinda like how homeowners go to Home Depot and later hire a contractor because they can't do it right. Post your light once in a thread you started, and let it go.

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I'm also not exaggerating. My dynamo current output is 700mA with two power LED's in series and when used with high efficiency optics 500 Lumen is easily obtained. You can see this from the following graph available from SSC website.

Anyway, I was only responding to another comment about how DIY lighting could never be as good as commercially available lighting which is not true. In all reality DIY LED lighting is far ahead of manufacturers because of the extremely rapid pace of ever brighter LED's. It takes a lot of development time for a manufacturer to bring a new product to market. Currently Power LED's are in an extremely rapid development phase. An example is the jump from the Cree XR-E at 220 Lumen output (without optics) to the SSC P7 900 lumen (also without optics). The new SSC P7 with optics is so bright at full power it exceeds DOT limits for automotive headlight use.
Keep saying it to make yourself feel better. Your tire driven dynamo does not have a current output of 700mA, I have that POS as well, it's sitting in the parts box. Two Cree or Seoul does not put out 500 lumens. Your light is 350 lumens top.
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Old 06-25-08, 10:53 AM   #25
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Here's the email I got about the mount.

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I have a poor camera phone picture I just took for you. I threw in a cr123a battery as a reference to size....if that helps. It does come with both mounts pictured as well as some rubber pieces for padding on the handlebar.
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