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Old 04-17-09, 06:28 AM   #1
ericy
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How about a 7000 lumen LED array?

http://tesladownunder.com/LEDs.htm#100%20W%20LED

the actual array is available here:

http://cgi.ebay.com/1-PC-BRIGHTEST-1...3A1%7C294%3A50

They consume ~100W, and require a substantial heatsink. These are really designed to be used for streetlights, but the guy who wrote the page at the 1st link actually tried making a bike light out of the thing - kind of as a lark, I guess. He had this funny comment

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Above is the LED on my bike with the focusing lens. It makes my very adequate 3 W LED bike headlight look rather puny. It's like having a new weapon on your space fighter. Now, let's go and use it irresponsibly...
The light is bright enough that it is somewhat of a fire hazard..
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Old 04-18-09, 09:28 PM   #2
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Quote:
Originally Posted by ericy View Post
http://tesladownunder.com/LEDs.htm#100%20W%20LED

the actual array is available here:

http://cgi.ebay.com/1-PC-BRIGHTEST-1...3A1%7C294%3A50

They consume ~100W, and require a substantial heatsink. These are really designed to be used for streetlights, but the guy who wrote the page at the 1st link actually tried making a bike light out of the thing - kind of as a lark, I guess. He had this funny comment



The light is bright enough that it is somewhat of a fire hazard..
ROFL. That guy has some weirdo devices on there
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Old 04-18-09, 09:53 PM   #3
unterhausen
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That's pretty cool. There are more useful arrays. Osram is now making one that will put out 1000 lumen at reasonable power levels. It has a six element array. I'm not sure how much more we really need. If they get more efficient, it may turn out that road users are more than happy with a 2 element array, or one of the 4 element arrays at fairly low current.
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Old 05-04-09, 06:42 AM   #4
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Unter, do you have a link to that Osram model? I was just thinking about how to use the Golden Dragons.
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Old 05-04-09, 10:10 AM   #5
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have you seen this?


I was looking at the Osram at Digikey, but the person that used them as shown in the mtbr thread said that Digikey may not send you the best bins.
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Old 05-05-09, 11:05 AM   #6
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Take a look at my last bike lighting project: it uses one Osram Ostar in a compact aluminum housing...

http://freenet-homepage.de/sbange/el...009/index.html

I intend to update that page in the near future with more information on the electronics...

unterhausen: I agree that you probably won't need much more than 1000lm-2000lm for night rides but it would certainly be nice if Osram could somehow keep the >1000lm output but significantly increase the luminous efficiency of their devices... other companies do have much better LEDs, but when it comes to power per device the Ostar is still quite good.
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