Eiger Solid Copper QTC Lug

mcbrat

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Iowa
I don't think I'd want any more emitter that it has for what it's uses are.
 

Curt R

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Mar 22, 2009
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486
As to the question of using the XPG LED instead of the XPG2 LED.

First, when we buy LEDs we get them by the reel or several reels at a time.
We still have over 750 XPG LEDs in stock. If someone wants to buy what
we have at the XPG2 price, we will gladly do that. ( No ).

Second, we have found here that the difference between the two in the
same bin at running temperature overlaps each other in output.

Third, Cree's own testing indicates a wide range of output over time at
the same drive currents and junction temperature.

XPG LED: @1000 mA drive, 73K hrs to 82K hrs
@1500 mA drive, 73K + hrs

XPG2 LED: @700 mA drive, 27K hrs to 51K hrs
@1000 mA drive, 24K hrs to 54K hrs
@1500 mA drive, 24K hrs to 36K hrs

The light output from the solid optics that we use shows a decrease
of 1 to 2 % less Lumems with the XPG2 over that of the XPG LED. There is
also a decrease in candelas in the optic used in the Eiger from 3.7 cd/lm
to 3.5 cd/lm as measured by Lideil. With the high output "X" units
that is an 80 candlepower loss as compared to the original "old" XPG LED.
The XPG2 requires an optic designed only for it to equal that of the XPG.

The Cree data sheet for the XPG states 493 Lumens at 4.9 watts maximum.
The Cree data sheet for the XPG2 states 488 Lumens at 4.8 watts maximum.
The XPG cost is less than the XPG2, yet Cree states that the XPG2 has 2.5
times the lumen cost advantage over that of the "old" XPG. ???

So after doing this research, until we get data that indicates that the
XPG2 is really better than the "old" XPG, we will more than likely still buy
the "old" XPG again.

Curt
 
Last edited:

Curt R

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Mar 22, 2009
Messages
486
We can make a Lug body into a pocket, we just remove the lug
and turn the back flat.

Curt
 

HKdude

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Dec 24, 2013
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166
Location
Tempe AZ
I recently picked up one of the copper Eigers, and what a little tube o' light! Satisfies my Cu cravings, fits on my keychain, and tosses out alot of light at max. The QTC allows for low to high with just a short twist.
I'm a big fan of the QTC tech, and the Peak lights in general. Simple and Durable, with a excellent warrantee, it's a flashlight you can depend on in the worst conditions. No massive assembly line, Robyn and Curt actually make your light with their own hands. The "Makers" are as nice a folks as you'll ever meet, and I highly recommend their products and service.
Kevin
 

calipsoii

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Apr 21, 2010
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1,411
Curt, it is great to see you posting again! Your technical battery runtime posts from when the El Cap and Eiger were introduced are still some of my favorites on this forum. Please keep it up, many of us are reading and enjoying them.
 

Kamerat

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Aug 24, 2012
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Location
Norway
Curt, it is great to see you posting again! Your technical battery runtime posts from when the El Cap and Eiger were introduced are still some of my favorites on this forum. Please keep it up, many of us are reading and enjoying them.

Link?
 
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