XPL HI V3 vs. XPG2 S4

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flucero28
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XPL HI V3 vs. XPG2 S4

Im hoping I can get some opinions on this from any of you that may have experience with these two emitters. I picked up a surefire g2x pro 200 lumen model (cree xpe). I plan on re-flowing one of the two aforementioned emitters onto the existing PCB. I estimate the stock driver circuit delivers approximately 1amp to the LED on high. I know I am probably splitting hairs in terms of a difference between the two in terms of output and efficiency. I have both emitters and cannot decide which one I should use. Suggestions?

Thank you!

Frank

Lexel
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HI LED has less tint shift between spill and hotspot

Both LEDs got about same efficiency at 1A

staticx57
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At one amp they will be remarkably similar in output. What are you trying to do accomplish? You can get more throw out of an XPG2?

flucero28
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Thanks Lexel. I want a decent compromise between throw and spill however more emphasis on throw. Will the xpg2 still offer slightly better throw over the xpl-hi? Both are 5000K temp which is my preferance in a duty light which this will be.

Enderman
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Lexel wrote:
HI LED has less tint shift between spill and hotspot

Both LEDs got about same efficiency at 1A


No, the XL-P HI is using the new process while the XP-G2 is old, there is a huge efficiency difference.

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staticx57
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Enderman wrote:
Lexel wrote:
HI LED has less tint shift between spill and hotspot

Both LEDs got about same efficiency at 1A


No, the XL-P HI is using the new process while the XP-G2 is old, there is a huge efficiency difference.
!https://c1.staticflickr.com/8/7746/26706053304_5e48be39ba_o.jpg!

At one amp, both of the two emitters are the same. It’s in th chart you provided
Lexel
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wizardyhnr
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a little confusing. From the data sheet, they are close. One thing does not seem correct in the measured chart is the Vf of XP-G2. It is way higher than other LEDs.

Lexel
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Depends which model of XPG2 in this chart measured, cree changed production process for XPG2, the newest one have also a slightly larger die size

Enderman
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staticx57 wrote:

At one amp, both of the two emitters are the same. It’s in th chart you provided

No it is not……………………..

The XP-L HI is at 3v while the XP-G2 is at 3.5v.

You know that “effficiency” is not just how many lumens it makes, right?

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Jerommel
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In other words, the power consumption is higher when the Vf is higher (while the current is the same as in this case at 1 Ampere with same lumen output).
Power is Voltage x Current. P = U x I

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Enderman
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This ^^

More watts + same lumen output = lower efficiency.

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flucero28
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Thank you all for the input. Im decinitely leaning towards the xpl hi due to the better efficiency. Hopefully if time permits I can do the swap in the next few days!

staticx57
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Yes, but assuming it’s a regulated driver set to deliver one amp the output should be remarkably similar, no?

Enderman
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staticx57 wrote:
Yes, but assuming it’s a regulated driver set to deliver one amp the output should be remarkably similar, no?

Yes the output is almost exactly the same.
But OP said “output and efficiency” and the XP-L HI has significantly better efficiency, about 15-20%.
So taking into account both output and efficiency, the XP-L HI is the better choice of the two.

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RobertB
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Would be nice to see the chart with only the two. Almost looks like there’s a 100lm difference at the same current. 20% difference

Lexel
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The cree comparator says the XPL has a 2% better efficiency compared to input power
Compared to current which is important for linear drivers they are almost identical
The forward voltage of the XPG2 should not be higher than the XPL

Enderman
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Lexel wrote:
The cree comparator says the XPL has a 2% better efficiency compared to input power
Compared to current which is important for linear drivers they are almost identical
The forward voltage of the XPG2 should not be higher than the XPL

It is though, in both the cree datasheets and IRL tests.
http://www.cree.com/led-components/media/documents/XLampXPG2.pdf
http://www.cree.com/led-components/media/documents/ds-XPL.pdf

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