XHP35 output and death test + PWM efficiency test by Texas_Ace

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Texas_Ace
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XHP35 output and death test + PWM efficiency test by Texas_Ace

Ok, another installment of the LED test series, think this is the last of the test I have done so far.

Thanks to KawiBoy1428 for donating the LED’s for testing!

First up we have the best output test from an undamaged high bin LED.

Click any image to see it larger


This next test is of a low bin 90cri HD version and the goal with this one was to see if it could handle an FET driver at full power and what the efficiency was like at lower levels. It only looses 11% efficiency at 50% duty. So while the super low modes would not be very efficient the mid and high modes will work just fine with an FET + PWM to limit current.


This last test is purely to see what these LED’s could handle and when it would die. There had been debate in the past that these led’s randomly combust at ~3A, it seems they can actually handle quite a bit more then that.


It is interesting that both the XHP35 and the XP-L2 both max out around ~40W, I am thinking this might be the “limit” for the XP footprint to dissipate heat with the tiny thermal pad. I would love to see the XM-L3 released with the latest setup and see if it can handle more power due to the larger footprint.

The Second Amendment is in place in case the politicians ignore the others.

Government is the great fiction, through which everybody endeavors to live at the expense of everybody else. -- Frederic Bastiat , French economist(1801-1850)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT

How I made a True integrating PVC sphere with no math involved

pinkpanda3310
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Thanks for doing this test TA. Looks like 2A is the sweet spot and 2.5a to push it hard. I would have thought 3A would be the max usable current but it’s not any better than 2.5a.

Texas_Ace
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Yeah, 2.5A is a good current for the XHP35. up to 3A will give you higher numbers in the first 30 seconds though.

The Second Amendment is in place in case the politicians ignore the others.

Government is the great fiction, through which everybody endeavors to live at the expense of everybody else. -- Frederic Bastiat , French economist(1801-1850)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT

How I made a True integrating PVC sphere with no math involved

CRX
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Cool, thanks.

Jerommel
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Interesting!
I would say 1.75 Amperes is the ‘recommended maximum’.
Above that efficiency suffers considerably.
It’s a 20 Watt LED basically, but does 100LM per Watt at around 15 Watts, which is the same as XP-L2 (!!)

[edit]
O, wait, i was looking at the damaged XHP35 results.. Sorry..

Looking for:

5” parabolic reflector (for recoil light)

johny723
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Maybe a dumb question, but looking at the results, does an xhp 35 have any advantage over an overdriven xp-l2?

Texas_Ace
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johny723 wrote:
Maybe a dumb question, but looking at the results, does an xhp 35 have any advantage over an overdriven xp-l2?

Not nearly as much as it had over the XP-L.

The biggest advantage is the lack of extreme tint shift and coming in a HI emitter. It also does provide more output.

I experimented with some super tall centering rings to block the tint shift, it does reduce the tint shift but it would have to be a really high ring to block it. The tint shift actually seems to come from the dome and not from the edge of the die like first thought.

The Second Amendment is in place in case the politicians ignore the others.

Government is the great fiction, through which everybody endeavors to live at the expense of everybody else. -- Frederic Bastiat , French economist(1801-1850)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT

How I made a True integrating PVC sphere with no math involved

Rufusbduck
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pinkpanda3310 wrote:
Thanks for doing this test TA. Looks like 2A is the sweet spot and 2.5a to push it hard. I would have thought 3A would be the max usable current but it’s not any better than 2.5a.

Remember he’s using an actively cooled set up unlikely to be duplicated in a handheld light, even a larger one, so in real world conditions they probably do self imolate @3A and diminish output well before that.

Three Tanna leaves to give him life, nine to give him movement. But what if he eats the whole bag?

Scott

Texas_Ace
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Rufusbduck wrote:
Remember he’s using an actively cooled set up unlikely to be duplicated in a handheld light, even a larger one, so in real world conditions they probably do self imolate @3A and diminish output well before that.

In order to try to replicate a flashlight I actually reduce the cooling efficiency of my setup on purpose. For example I do not use thermal grease on the star. The heat sink while large is far from the largest I could have used.

It appears to replicate flashlight use fairly well, at least for the first few minutes.

Be increasing clamping pressure and adding thermal grease I can improve the numbers some but that is for sure well outside what will ever be seen in a flashlight.

From Dales testing he saw higher lumens at turn on at up to 3.1A IIRC, which lines up very closely with the test here.

The Second Amendment is in place in case the politicians ignore the others.

Government is the great fiction, through which everybody endeavors to live at the expense of everybody else. -- Frederic Bastiat , French economist(1801-1850)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT

How I made a True integrating PVC sphere with no math involved

Rufusbduck
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Silly me, I thought you had a nuclear plant cooling tower hooked up to a small block Chevy with twin turbo’s. Facepalm I’ll be interested to see what people get and how they achieve it.

Three Tanna leaves to give him life, nine to give him movement. But what if he eats the whole bag?

Scott

SawMaster
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Rufusbduck wrote:
Silly me, I thought you had a nuclear plant cooling tower hooked up to a small block Chevy with twin turbo’s. Facepalm I’ll be interested to see what people get and how they achieve it.

Not TA’s style. It would have to be a blown 800 inch big block for him Big Smile and even that would be marginal Silly

You gotta like his fearless pushing of things to (and over) the limit Cool

Phil

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SawMaster wrote:
Rufusbduck wrote:
Silly me, I thought you had a nuclear plant cooling tower hooked up to a small block Chevy with twin turbo’s. Facepalm I’ll be interested to see what people get and how they achieve it.

Not TA’s style. It would have to be a blown 800 inch big block for him Big Smile and even that would be marginal Silly

You gotta like his fearless pushing of things to (and over) the limit Cool

Phil

lol, actually I am 100% a turbo guy. I love me a good ole Blown big block naturally but I really love a nice sleeper turbo setup that you never see coming.

Not to mention that turbos are better, make more power and win more races. Thats why all the outlaw guys have gone turbo in recent years, they are just better.

Cars are a topic I could go on about forever. Built a few in my time, also blown a few. You learn from things that go wrong, not things that go right.

As long as you learn something from a mistake or when something goes wrong, then it was a good thing.

The Second Amendment is in place in case the politicians ignore the others.

Government is the great fiction, through which everybody endeavors to live at the expense of everybody else. -- Frederic Bastiat , French economist(1801-1850)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT

How I made a True integrating PVC sphere with no math involved

Texas_Ace
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I went on a bit of an XHP35 binge today, I built a 1504 with an XHP35 HI H2 3C 80CRI using 26350’s.

It is using a Texas Avenger driver with FET only and PWM to keep current from going to high. Runs about 2.5A on high.

It is not bad, a bit ringy but I am using a white centering ring at the moment, going to print a black one off and see what that does.

Makes about ~1200 lumens OTF in flood mode, forgot what it was in zoom, think it was around 800? I didn’t really pay attention to the lumens since this was a throw build.

Around 250kcd for 1000M of throw. Outside you don’t really notice the rings. Overall it looks nice but gonna see what it looks like tonight. A bit better throw then the DO1 I built but the DO1 had more spill and a better overall beam IMO.

The other build is a Convoy L2 with the same LED and driver both with 26350 and 26650 although I think I will be using the 26350.

It is making a bit over 2100 lumens OTF @ 2.5A also with PWM to keep the current in check.

Tint is good and beam is as well. The interesting thing is that I have an XP-L HI L2 that is the same tint and build (although I don’t think it is a V2 bin XP-L).

Comparing them side by side inside and the L2 has about twice the hotspot size but otherwise the beam is basically the same. Interestingly the throw is a bit better on the XHP35 light (it was around a 8-10% improvement).

I really like the XHP35, I just wish that it didn’t need 4S cells.

The Second Amendment is in place in case the politicians ignore the others.

Government is the great fiction, through which everybody endeavors to live at the expense of everybody else. -- Frederic Bastiat , French economist(1801-1850)

Texas Avenger Driver Series

My LED Test series - XP-L2 V5  - Nichia 219C 90+ CRILatticebright "XM-L"XHP35 & PWM efficiency - XHP50 - XP-L V5 - XM-L2 U2 - XP-G3 S5  - XP-L HI V2 - Oslon Square & direct comparison to Djozz tests - Nichia 319A - Nichia 219B 9080 CRI - Nichia 219C D320 - Nichia 229AT

How I made a True integrating PVC sphere with no math involved