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The last headlight you will ever need



 
 
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  #1  
Old March 25th 14, 09:40 AM posted to rec.bicycles.tech
somebody[_2_]
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Posts: 193
Default The last headlight you will ever need

Now I have seen everything:

http://www.fasttech.com/products/1/1...-3-mode-3200lm
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  #2  
Old March 25th 14, 10:53 AM posted to rec.bicycles.tech
James[_8_]
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Posts: 5,758
Default The last headlight you will ever need

On 25/03/14 20:40, somebody wrote:
Now I have seen everything:

http://www.fasttech.com/products/1/1...-3-mode-3200lm


No thank you.

--
JS
  #3  
Old March 25th 14, 01:02 PM posted to rec.bicycles.tech
Sir Ridesalot
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Default The last headlight you will ever need

On Tuesday, March 25, 2014 5:40:39 AM UTC-4, somebody wrote:
Now I have seen everything:



http://www.fasttech.com/products/1/1...-3-mode-3200lm


Notice how close the light is to the beam shown? Notice the nice hot spot on that beam? Over 6.75 inches wide (172mm) and it goes on your handlebars?

Sounds and looks like a bunch of flashlights mounted together but not giving a very useful beam pattern to see the road surface with.

In strobe mode that light will be most annoying to anyone approaching it from in front.

I'd pass on it too.

Cheers

  #4  
Old March 25th 14, 01:18 PM posted to rec.bicycles.tech
Duane[_3_]
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Posts: 1,900
Default The last headlight you will ever need

On 3/25/2014 9:02 AM, Sir Ridesalot wrote:
On Tuesday, March 25, 2014 5:40:39 AM UTC-4, somebody wrote:
Now I have seen everything:



http://www.fasttech.com/products/1/1...-3-mode-3200lm


Notice how close the light is to the beam shown? Notice the nice hot spot on that beam? Over 6.75 inches wide (172mm) and it goes on your handlebars?

Sounds and looks like a bunch of flashlights mounted together but not giving a very useful beam pattern to see the road surface with.

In strobe mode that light will be most annoying to anyone approaching it from in front.

I'd pass on it too.

Cheers


I wouldn't have to turn it on to reject it. I can't imagine mounting a
piece of junk like that on my bars.

But I think the OP's point was to be sarcastic, no?
  #5  
Old March 25th 14, 03:33 PM posted to rec.bicycles.tech
Radey
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Posts: 36
Default The last headlight you will ever need

somebody writes:

Now I have seen everything:

http://www.fasttech.com/products/1/1...-3-mode-3200lm


Have you seen a man eat his own head?

--
  #6  
Old March 25th 14, 03:50 PM posted to rec.bicycles.tech
SMS
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Posts: 8,323
Default The last headlight you will ever need

On 3/25/2014 2:40 AM, somebody wrote:
Now I have seen everything:

http://www.fasttech.com/products/1/1...-3-mode-3200lm


3200 lumens is pretty lame. See
http://www.aliexpress.com/item/free-shipping-5000-Lumen-2x-CREE-XM-L-T6-LED-Bike-Bicycle-Light-Headlamp-Flashlight/1492257169.html

Talk about Lumenflation!
http://www.urbandictionary.com/define.php?term=lumenflation

But Frank should love it because the beam is not symmetrical.

Remember, those are Chilumens, not lumens
http://www.urbandictionary.com/define.php?term=chilumen.

How will the StVZO
http://www.urbandictionary.com/define.php?term=stvzo feel about these
lights?

  #7  
Old March 25th 14, 03:53 PM posted to rec.bicycles.tech
Jeff Liebermann
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Posts: 2,887
Default The last headlight you will ever need

On Tue, 25 Mar 2014 05:40:39 -0400, somebody
wrote:

Now I have seen everything:
http://www.fasttech.com/products/1/1...-3-mode-3200lm


Seven Cree T6 lights (10 watts or 3v @ 3A max).
http://www.cree.com/~/media/files/cree/led%20components%20and%20modules/xlamp/data%20and%20binning/xlampxml.pdf
I'll assume that they run it at 1A to keep the heat down.

The battery pack is too small and is not going to work. The lamp data
sheet shows that the 8.4v battery pack is six 18650 cells, which are
running at 1A output. So, how is this thing suppose to light up LED's
that can use up to 3A with only 1 watt max? I don't see an LED
driver/inverter anywhere. An 8.4v @1A battery pack will deliver 8.4
watts. Yet, the lights can conceivably use 6-10 watts *EACH* or more
conservatively, about 3 watts *EACH* if running at 1A. Assuming 3
watts per lamp for a total of 21 watts, an 8.4 watt battery pack can
run the lights to about 25% battery capacity remaining in 18 minutes.
Sounds great for very short rides.

I gotta get back to work, but this was too good to ignore. Thanks.

--
Jeff Liebermann
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
  #8  
Old March 25th 14, 06:04 PM posted to rec.bicycles.tech
SMS
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Posts: 8,323
Default The last headlight you will ever need

On 3/25/2014 8:53 AM, Jeff Liebermann wrote:
On Tue, 25 Mar 2014 05:40:39 -0400, somebody
wrote:

Now I have seen everything:
http://www.fasttech.com/products/1/1...-3-mode-3200lm


Seven Cree T6 lights (10 watts or 3v @ 3A max).
http://www.cree.com/~/media/files/cree/led%20components%20and%20modules/xlamp/data%20and%20binning/xlampxml.pdf
I'll assume that they run it at 1A to keep the heat down.

The battery pack is too small and is not going to work. The lamp data
sheet shows that the 8.4v battery pack is six 18650 cells, which are
running at 1A output. So, how is this thing suppose to light up LED's
that can use up to 3A with only 1 watt max?


That reseller made stuff up.

The actual manufacturer information doesn't claim any of that stuff
http://www.trustfire.net.cn/product/1723645844-219463416/2014_newest_TrustFire_factory_D013_high_power_led_ bike_light_3200Lm_7_CREE_XM_L_2_waterproof_led_bik e_light.html

Those batteries are certainly able to deliver 4A.

The big question is whether you can power them from a hub dynamo!
  #9  
Old March 25th 14, 08:25 PM posted to rec.bicycles.tech
Frank Krygowski[_4_]
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Posts: 6,271
Default The last headlight you will ever need

On 3/25/2014 11:50 AM, sms wrote:


But Frank should love it because the beam is not symmetrical.


The question now apparent is this: Does Mr. Scharf know the definition
of symmetrical? For a clue to the answer, examine the photo of the
beam. Here it is:
http://fasttechcdn.com/products/166/...02-2-thumb.jpg
"Not symmetrical"?

For those new to the discussion: It takes more than asymmetry to make a
really good headlight beam. Start by looking at the beam from the
headlight of a motorcycle or modern automobile. Then try reading
http://www.peterwhitecycles.com/plight.asp


--
- Frank Krygowski
  #10  
Old March 25th 14, 08:57 PM posted to rec.bicycles.tech
somebody[_2_]
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Posts: 193
Default The last headlight you will ever need

On Tue, 25 Mar 2014 09:18:57 -0400, Duane
wrote:

On 3/25/2014 9:02 AM, Sir Ridesalot wrote:
On Tuesday, March 25, 2014 5:40:39 AM UTC-4, somebody wrote:
Now I have seen everything:



http://www.fasttech.com/products/1/1...-3-mode-3200lm


Notice how close the light is to the beam shown? Notice the nice hot spot on that beam? Over 6.75 inches wide (172mm) and it goes on your handlebars?

Sounds and looks like a bunch of flashlights mounted together but not giving a very useful beam pattern to see the road surface with.

In strobe mode that light will be most annoying to anyone approaching it from in front.

I'd pass on it too.

Cheers


I wouldn't have to turn it on to reject it. I can't imagine mounting a
piece of junk like that on my bars.

But I think the OP's point was to be sarcastic, no?


Yes, I forgot the sarcasm header...

But is there one floating out there with even more LEDs?
 




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