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Superflux LEDs

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whammoed:


--- Quote from: RandyT on November 06, 2009, 02:11:48 pm ---
--- Quote from: whammoed on November 06, 2009, 01:44:48 pm ---I understand what you are saying but could you explain how it applies to the following two examples:
5mm blue LED: http://www.superbrightleds.com/specs/b2_specs.htm
High Flux blue LED: http://www.superbrightleds.com/specs/hf5-b5590.htm

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Sure, if you explain what it is you would like explained.   Do you see a significant contradiction?



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One is putting out 5500 mcd over 90 degrees and the other is putting out 5500 mcd over 30 degrees but is rated at the same amps and a higher voltage.   Seems like the total output is greater for the LED that requires a lower voltage.

RandyT:


--- Quote from: whammoed on November 06, 2009, 02:35:26 pm ---One is putting out 5500 mcd over 90 degrees and the other is putting out 5500 mcd over 30 degrees but is rated at the same amps and a higher voltage.   Seems like the total output is greater for the LED that requires a lower voltage.

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Ask for a proper spec sheet.  Do some research and you will find that the "superflux", "UFO", "Pirhana", etc....leds in this package are capable of handling higher current, so it's more than very likely that this transcription to the web is incorrect.

Also, these LED's are based on different compounds and have slightly different major wavelengths.  To do a proper comparison, these should be the same. 

Check out the efficiency section of the LED Wiki, as that is what we are basically discussing here.  While it's possible (even probable) that one LED product will have slightly better or worse efficiency than another, especially in different wavelengths, you seem to be hoping for an order of magnitude difference that current LED technology won't support.

RandyT


whammoed:


--- Quote from: RandyT on November 06, 2009, 02:58:31 pm ---
--- Quote from: whammoed on November 06, 2009, 02:35:26 pm ---One is putting out 5500 mcd over 90 degrees and the other is putting out 5500 mcd over 30 degrees but is rated at the same amps and a higher voltage.   Seems like the total output is greater for the LED that requires a lower voltage.

--- End quote ---

Ask for a proper spec sheet.  Do some research and you will find that the "superflux", "UFO", "Pirhana", etc....leds in this package are capable of handling higher current, so it's more than very likely that this transcription to the web is incorrect.

Also, these LED's are based on different compounds and have slightly different major wavelengths.  To do a proper comparison, these should be the same. 

Check out the efficiency section of the LED Wiki, as that is what we are basically discussing here.  While it's possible (even probable) that one LED product will have slightly better or worse efficiency than another, especially in different wavelengths, you seem to be hoping for an order of magnitude difference that current LED technology won't support.

RandyT


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Thanks Randy. I wouldn't say I was hoping for anything, I was just going by the specs provided.  I look at specs but always go with what works in the real world.  If it does what I want it to do I use it.  I never trust the specs posted on Ebay but I thought the specs on that site might be more reliable.

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