Lumileds strikes back!

ViReN

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may i request mod's merge these two threads :).. that thread has got a very unique number too 150005 ;)
 

ViReN

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270winchester said:
thanks VIren. There are so many different threads on Fenix/jetbeam/wahtever Asian lights in LED, I didn't even notice this has already been talked about.

I'll go look for it now, hope I don't see one too many threads on "look what new lights that look like ____ but isn't" and get lost.

CPF is being flooded with the new generation LED's at lower costs with reasonable quality.... it wont be a surprise if 'they' come out with a new Luxeon based light first ;)

when These LED's surface in 2 years time (guesstimating on K2timeline) It would be worth a look, just wondering what will Western Cree and Eastern Soul have... all I know is Lights will be going north :)
 

CM

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I bet they pulse the heck out of that to get the high lumen/watt numbers that they're claiming. Most lighting applications use continous (not pulsed) current.
 

x2x3x2

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So am i right to say that this new LED will run 2A at about 4.15V?
If so, it will be pretty sweet to have a torch putting out ~500 lumens for 1+ hour on let say a 18650.

Question #1: Can 3.7V Li-Ion batts like 18650 and RCR123 handle current draw of 2A+, taking into consideration extra current draw from a single 18650 3.7V cell to reach 4.15V with boost circiut.

Question #2: Any idea how widely available these will be, or will they be like a X-bin Luxeon III?
 

chris_m

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Quick reality check for x2x3x2 - the 2A rating is just a lab theoretical figure. I can confidently predict nobody will be making a light running one at that power level.

Answer #2: Predicted imminent availability is they will be as common as Z-bin Lux 3s :D
 

wasBlinded

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chris_m said:
Quick reality check for x2x3x2 - the 2A rating is just a lab theoretical figure. I can confidently predict nobody will be making a light running one at that power level.

Wow! I'm impressed that you can so confidently predict the future. Thats usually a losing game around here.

My guess is that if Lumileds releases an LED they believe is capable of handling a 2 amp drive current, someone will make a light that does just that. Whether it will reach 500 lumens in common applications is perhaps a bit more questionable.
 

wasBlinded

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x2x3x2 said:
So am i right to say that this new LED will run 2A at about 4.15V?
If so, it will be pretty sweet to have a torch putting out ~500 lumens for 1+ hour on let say a 18650.

Question #1: Can 3.7V Li-Ion batts like 18650 and RCR123 handle current draw of 2A+, taking into consideration extra current draw from a single 18650 3.7V cell to reach 4.15V with boost circiut.

The Li-ion cells can safely provide 1.5C in most instances. That means an LG2400 could come up with 3.6 amps and would be sufficient to drive a white LED at 2 amps with the proper boost circuit. Over the discharge profile of a Li-ion cell, the current draw would probably range from 2.4 to 3.5 amps. Clearly a single RCR123 would not be up to this task. Even two RCR123 in series with a buck convertor would be pushing things a bit.
 

Miracle

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is this still the prototype stage?

or are the led module in the factory boxes already?

:huh2:
 

Illum

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the fact that this thing needs to draw 2 amps to reach 500 lumens sort of throws me off the interest....2 amps is alot for a battery requirement:ohgeez:
 

wasBlinded

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Illum_the_nation said:
the fact that this thing needs to draw 2 amps to reach 500 lumens sort of throws me off the interest....2 amps is alot for a battery requirement:ohgeez:


Assuming they can deliver this year (a big if), where else could you get 500 lumens from about 8 watts and a 1mmx1mm point source of light? Thats going to be about 60 lumens per watt, which isn't shabby. And the surface brightness of such a beast means you could build a real throw monster light without a large reflector.

Again, the usual caveats apply - when will we see it, and is it achievable in real world applications?
 

TMorita

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wasBlinded said:
The Li-ion cells can safely provide 1.5C in most instances. That means an LG2400 could come up with 3.6 amps and would be sufficient to drive a white LED at 2 amps with the proper boost circuit. Over the discharge profile of a Li-ion cell, the current draw would probably range from 2.4 to 3.5 amps. Clearly a single RCR123 would not be up to this task. Even two RCR123 in series with a buck convertor would be pushing things a bit.

I fly R/C helicopters, and we've been pushing lithium-polymer batts at over 10C for a few years now. The latest generation are rated at over 20C continuous.

So it's fairly trivial to run a white LED at 2 amps...you could do that with a single Thunder Power 1320maH lipo.

Toshi
 

Nitroz

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I think that this is possible. If anyone remembers that before the Cree XR-E was the XR Xlamp which was horrible, then came the XR-E.

So I can see the K2 was just testing a new design and the next generation will probably be awesome.

IMO, Lumileds Lux III LEDs have always had great quality and the excellent binning sure does help.
 

TMorita

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Great! 500 lumen flashlights the size of my thumb with a runtime of a few minutes!

:p

Toshi
 

luminari

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This is an interesting line: "The first devices using these technologies will be introduced in a new generation of products during this quarter. These new technologies will continue to proliferate in new, and existing, products throughout the next 12-18 months."

I wonder how the performance of these first devices will be? Will it be a revised K2 (ick) or something of the new 1x1mm^2 form factor? Anyways, not really a question. I see this as good news; at the very least, this news should hopefully spur on Seoul SC and Cree to further innovate.
 

mdocod

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funny to hear what sounds like complaining about a light source that requires 2 amps to make 500 lumens.

this would mean that a light the size of a Wolf-Eyes 6 series, (or Surefire 6 series) or the like, could be brighter than an incan P91 setup, and run 2-3 times as long... Even if the LED only delivered 400 lumens, and we could use a lens to get 350 out the front, that would still be an incredible advancement for such a small light.

Most li-ion cells I am familiar with are rated for at least 2C, not the 1.5C listed earlier... a single 18650 can safely deliver 4-5amps without a hiccup.
 

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