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Old 10-24-2008, 04:21 AM #1
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Default 2000 Lumen Bike Light

Hey all --

Read this (you have to read to understand what i am talking about):

http://www.instructables.com/id/Ulti...-lumens-with-/

Done? Ok. My science teacher wants to make one, but with 16 LEDs instead of four. The problem is, he wants it to run off of one 12 Volt battery and last 2 hours. It also needs to output 2000 Lumens. What value resistors would he need to use to make this work? I am stuck here.
I have come up with this schematic, but this is without the buckpuck. With this schematic, it would be drawing 1600mA from the battery.
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2000 Lumen Bike Light-quadrasun_001.jpg  


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Old 10-24-2008, 04:34 AM #2
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Default Re: 2000 Lumen Bike Light

Just use 3 of these!
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Old 10-24-2008, 04:35 AM #3
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Default Re: 2000 Lumen Bike Light

Quote:
Originally Posted by Artix

It has to be cyan, though ;D
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Old 10-24-2008, 09:45 AM #4
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Default Re: 2000 Lumen Bike Light

Why?
Yes they claim that cyan is going to be better for night vision but I guarantee you that with 2000 lumens it's not going to freakin matter. *You'll see EVERYTHING. On another note. Each one of those LED's is rated at almost 1000 lumens each so with 3 your going to get almost 3000 lumens. You could even utilize this little badboy right here!

http://www.dealextreme.com/details.dx/sku.11922
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Old 10-24-2008, 12:50 PM #5
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Default Re: 2000 Lumen Bike Light

Using normal LED's, there is no way your gonna acheive 2000 lumens. Maybe 200-600, but nowhere near 2000. Your going to have to look at a few star LED/luxeon/cree LED's, a few of them will gve you ALOT of power. As for cyan, maybe you could grab a few blue and a few green ?
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Old 10-24-2008, 10:11 PM #6
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Default Re: 2000 Lumen Bike Light

Quote:
Originally Posted by Things
Using normal LED's, there is no way your gonna acheive 2000 lumens. Maybe 200-600, but nowhere near 2000. Your going to have to look at a few star LED/luxeon/cree LED's, a few of them will gve you ALOT of power. As for cyan, maybe you could grab a few blue and a few green ?
Thats why he is going to use Luxeon Star LEDs.
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Old 10-25-2008, 03:33 AM #7
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Default Re: 2000 Lumen Bike Light

Well, 16 Luxeon V cyan emitters is 2560 lumens.

While browsing Luxeon's site, hot damn triple rebel! Nice!
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