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Thread: ReLux -LED Light Bulb Replacments

  1. #31
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    Jun 2007
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    Quote Originally Posted by ledfreak3d View Post
    there are 20 - 100 watt white leds out there up to 6000 lumen
    yeah,

    check this out

    http://search.digikey.com/scripts/Dk...me=722-1051-ND

    11520 lm of 405nm drawing 160W @ 48V

    although, all these high power led's are really just LED arrays. It's kinda cheating.

  2. #32
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    Quote Originally Posted by Psi View Post
    11520 lm of 405nm drawing 160W @ 48V
    Well, that number is just wrong. I'll tell you how they came up with it and you'll see why. The radiant power is also shown in the listing - around 17W. This number was then multiplied with the luminous efficiency of light at 550 nm to get 11500.

    If you do it properly the result will be about 1/100th of that.

  3. #33
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    Jun 2007
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    well that's pretty fail

  4. #34
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    May 2008
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    Wisconsin
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    Tocket's right. Even if one could attain 100% efficiency, 160W of 405nm light would only be 70 lumens. 17W is only 7.5 lumens.

    Which is actually more like 1/1500th as much

  5. #35
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    Apr 2008
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    Amsterdam, NL
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    In the Netherlands all standard light bulb above 100W are already forbidden, and in 2010 ALL standard light bulb are forbidden.

    The good thing about it is it had a massive impact on the pricing of LED lamps.

    the pricing is now the same as a CF lamp, and thats about 10 euros for a 30W led equivalent (4W led bulb)

  6. #36
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    May 2008
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    Wisconsin
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    You pay 10 euros for a 4W CFL?

    update: I just noticed 13W CFLs for sale at the local dollar store today. (noname brand, though)
    Last edited by Xytrell; 10-04-2009 at 06:46.

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