3 Watt Luxeon Star Specs

I just got hold of the specs on the new 3 watt Luxeon Star. It has lux ratings at 700mA, and 1000mA. At 700mA, it goes as follows:

White, green, cyan: 51.7 Lumens
Blue: 13.
Royal blue: 275mW


At 1,000mA:

White: 72 lumens
Green, Cyan: 80 lumens
blue: 30
Royal blue: 450mW

Can't wait to get these! /ubbthreads/images/graemlins/grin.gif

Wayne

I find these specs to be very odd. With the exception of the white, when you compare the 700ma and 1000mA lumens, they all show a greater percentage increase in output than the percentage increase in current causing it. This is unlike the known characteristics of the 1W ones. The 1W ones show decreasing efficiency with increasing currents which is consistant with what is to be expected from InGaN LEDs.

Yeah, they are now rated at 1000A!!! Woohoo. Improved Lumens too /ubbthreads/images/graemlins/smile.gif

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hotbeam said:
Yeah, they are now rated at 1000A!!! Woohoo. Improved Lumens too /ubbthreads/images/graemlins/smile.gif

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1,000 amps?!?!? Well son of a diddly... /ubbthreads/images/graemlins/wink.gif /ubbthreads/images/graemlins/wink.gif /ubbthreads/images/graemlins/wink.gif /ubbthreads/images/graemlins/wink.gif /ubbthreads/images/graemlins/wink.gif

/ubbthreads/images/graemlins/eek.gif 1000mA /ubbthreads/images/graemlins/grin.gif

But we knew you could run them at 1000mA all along....

Does anyone know what the specified forward vF is for the 3W ?

-TIA

mine is around 3.5 at 900mA I think. s4k. wayne, are yours the same bin?

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Doug S said:
I find these specs to be very odd. With the exception of the white, they all show a greater percentage increase in output than the percentage increase in current causing it. This is unlike the known characteristics of the 1W ones.

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I'm only telling you what the pdf spec file told me. Is it odd? I don't know? /ubbthreads/images/graemlins/icon3.gif

Wayne

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Slick said:
Does anyone know what the specified forward vF is for the 3W ?

-TIA

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Luxeon III Emitter 4 Document #: DS45 (7/03)
PRELIMINARY DATA SHEET

For white, it is as follows:
Min: 3.03
Typical: 3.76
Max: 4.47

Wayne

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evan9162 said:
But we knew you could run them at 1000mA all along....

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I have run the 1W at up to 1.5 amps, with no problems. I have found that on the 1W, it is redundant to run it over 700mA, as nearly all the energy over that current is converted to heat.

I was very sceptical of the 3W, when I first received it, as it looks like a 1W on a 5W sink. However, the proof is in the brightness. I don't know all the techical stuff as to what they did, but it is definately not just a repackaged 1W. Running three of these 3W in my Tri-Star, it is definately much brighter than the three Q2 1W I have on another LED assembly. I don't think Lumileds would make false claims of brightness. If anything, they would understate the brightness.

Wayne j

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AilSnail said:
mine is around 3.5 at 900mA I think. s4k. wayne, are yours the same bin?

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I think so.

Wayne

Will your 3W lights be ready by Christmas time? /ubbthreads/images/graemlins/popcorn.gif

/ubbthreads/images/graemlins/grin.gif /ubbthreads/images/graemlins/icon6.gif /ubbthreads/images/graemlins/icon6.gif /ubbthreads/images/graemlins/icon6.gif /ubbthreads/images/graemlins/icon6.gif /ubbthreads/images/graemlins/icon6.gif

That's a Graemlin dipicting me calling FIRST IN LINE!!!!


/ubbthreads/images/graemlins/thumbsup.gif

I know I should go and search.... but..
Anyone have Macro Pics of the emmitter yet?

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Doug S said:
I find these specs to be very odd. With the exception of the white, they all show a greater percentage increase in output than the percentage increase in current causing it. This is unlike the known characteristics of the 1W ones.

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Yup. These would seem to be roughly 'P' bin (23.5 to 30.6 Lumens) parts as we now the 'one watt' stars. While such bins do exist, they are far from 'average'.

I smell marketing types at work......

Doug Owen

I agree with what Wayne says. Seems they have done something special to them. As DD 3x1W is not as bright as DD 3x3W in his tri-star. And I have heard many say over 700ma on 1W is pointless. But if these 3W increase output when you go to 1amp then allrighty then!! /ubbthreads/images/graemlins/thumbsup.gif
I think we are just used to thinking if it doesn't have more dies (grills ala 1w to 5w) then it's just overdriven. But think about old school 5mm led's vs todays. They look the same, but.... /ubbthreads/images/graemlins/smile.gif

So it's more of an efficiency thing then I guess. Maybe the bond wires are bigger. Maybe on 1W's @ 700ma the bond wires were acting like a resistor?? Who knows? /ubbthreads/images/graemlins/icon3.gif

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Doug Owen said:
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Doug S said:
I find these specs to be very odd. With the exception of the white, they all show a greater percentage increase in output than the percentage increase in current causing it. This is unlike the known characteristics of the 1W ones.

[/ QUOTE ]

Yup. These would seem to be roughly 'P' bin (23.5 to 30.6 Lumens) parts as we now the 'one watt' stars. While such bins do exist, they are far from 'average'.

I smell marketing types at work......

Doug Owen

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Doug O: I think you missed my point. Rereading my post I can see that I did a poor job of expressing myself. I will edit the post for clarity.

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Doug S said:


Doug O: I think you missed my point. Rereading my post I can see that I did a poor job of expressing myself. I will edit the post for clarity.

[/ QUOTE ]

Ah, so. I see what you mean. They claim a 39% increase in light for a 42% increase in current? Neat trick at 'full blast' Maybe two different units?

Doug Owen

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IsaacHayes said:

So it's more of an efficiency thing then I guess. Maybe the bond wires are bigger. Maybe on 1W's @ 700ma the bond wires were acting like a resistor?? Who knows? /ubbthreads/images/graemlins/icon3.gif

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They know. And I suspect Christian knows (or could find out if I can interest him) if it's real. But I'm as close to sure as I can be without 'being there' that this is *not* the case. The rules of material science don't allow such things to 'just happen', and if by design, I'd expect to see it show up in existing product lines first, wouldn't you? They'd love to make some quick profits on existing product lines no doubt. Keep in mind, we are *not* their main customer base.

The CRADA Christian is working under with them is *specifically* for increased efficiency (and color control), it's highly unlikely that a breakthrough will show up in production rather than R&D.......

For sure bond wire resistance is not an issue WRT this stuff.

Doug Owen