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PostPosted: Sat Sep 15, 2012 10:25 pm 
Gold Trader / MacRetro rider
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Joined: Sun Apr 02, 2006 1:03 pm
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Location: Returning
old_coyote_pedaller wrote:
Autumnal? Feck me it's been autumn all summer long up here.
Now it's gone straight to winter.


Anyway,
http://www.ebay.co.uk/itm/Bike-Bicycle- ... 7212039924


was summer today

so whats the latest Asian light phenomenon ?


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PostPosted: Sun Sep 16, 2012 10:09 am 
retrobike rider
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Location: Northumberland
This looks like fun 3600lumen


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PostPosted: Sun Sep 16, 2012 5:13 pm 
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3600 lumens eh, you'll have to excuse me if I seem a little sceptical :lol:


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PostPosted: Sun Sep 16, 2012 5:17 pm 
retrobike rider
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It won't be. But it's 3 XMLT6 chips so it should be impressive for the money.


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PostPosted: Sun Sep 16, 2012 5:50 pm 
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I'm sure it's brighter than the single T6 version but it might not be that much brighter. Three LEDs vs one doesn't necessarily make it any brighter. To drive three T6 LEDs as hard as they are driving the single T6 LED in the single LED light would require 3 times more current from the batteries. Can those cheap 18650's handle that??? It would also generate 3 times more heat and the single LED light wasn't exactly brilliant at exporting its heat to the outside casing. So this one could either burn out (quicker), catch fire (battery) or just not be that much brighter?

I suspect it will be have much more flood but less throw than the single LED light. Assuming it isn't actually three times brighter than the single LED light, the surface brightness of the LEDs will be lower than that of the single LED light as say 50% more lumens from 200% more surface area will result in a larger but dimmer beam profile. Also there are now three small reflectors rather than one large one and large reflectors focus the beam better.


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PostPosted: Tue Sep 18, 2012 9:08 am 
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Just keep on adding those XML's :lol:

http://www.ebay.co.uk/itm/9000-LM-Lumen ... 3ccaaedc63

http://www.ebay.co.uk/itm/10000-Lumen-9 ... 3a79d3b4d4


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 Post subject:
PostPosted: Tue Sep 18, 2012 9:16 am 
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The thing with that 3600lumen one is that if the LED's are driven lower would they last longer and the heat be less? Theres a UK guy selling a light and he states the same about his, could be driven harder but at the expense of the longevity.


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 Post subject:
PostPosted: Tue Sep 18, 2012 9:21 am 
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Heres a few more promising looking lights if you want to spend a bit extra.

http://www.mtbbatteries.co.uk/mountain- ... -light-v1/

http://www.mtbbatteries.co.uk/mountain- ... lumenator/

http://www.crgmoto.co.uk/gloworm-x2-led ... 1734-p.asp


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 Post subject:
PostPosted: Tue Sep 18, 2012 11:51 am 
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kaiser wrote:
The thing with that 3600lumen one is that if the LED's are driven lower would they last longer and the heat be less? Theres a UK guy selling a light and he states the same about his, could be driven harder but at the expense of the longevity.


Each LED may not be as hot but the total temp and the temp of driver board may well be higher.


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PostPosted: Tue Sep 18, 2012 12:11 pm 
Retro Guru
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Anyone had any of these3 ??


http://www.ebay.co.uk/itm/CREE-Q5-Bicyc ... 9640614586


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