Finally the XHP70.2 emerges!

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JaredM
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Can anyone report out on how the 70.2 performs in the SMO L6 reflector? Any donut hole? Lux?

Thanks.

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Thank you Jerommel, I see it now (when I know what to look for) Thumbs Up

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JaredM wrote:
Can anyone report out on how the 70.2 performs in the SMO L6 reflector? Any donut hole? Lux?

Thanks.


No donut hole for sure Smile
JasonWW
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JaredM wrote:
Can anyone report out on how the 70.2 performs in the SMO L6 reflector? Any donut hole? Lux?

Thanks.


I had a donut hole with the 50.2. It’s not so much the gaps between the dies that make the hole, it’s the emitter size. You can mostly make it hard to see if you adjust the reflector depth. It’s not too noticable in outdoor use, unless you shine it on a building side.

You can also try and offset the emitter slightly to get the hotspot smoother.

I think the closer dies on the new emitters make the dark center, less dark compared to the older emitters. I have pictures if you want.

I’m assuming the xhp70.2 will be the same as the 50.2. Less noticable donut hole, but still there.

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JaredM wrote:
Can anyone report out on how the 70.2 performs in the SMO L6 reflector? Any donut hole? Lux? Thanks.

I posted that a ways back - black hole appears only if within 1 foot from a wall, further than 1 foot - no hole.

JasonWW
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Tom E wrote:

JaredM wrote:
Can anyone report out on how the 70.2 performs in the SMO L6 reflector? Any donut hole? Lux? Thanks.

I posted that a ways back – black hole appears only if within 1 foot from a wall, further than 1 foot – no hole.


I’ve got pictures and video of the donut hole shaped hotspot from the 50.2 in my L6 with SMO reflector if you want me to upload them.

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JaredM
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Tom E wrote:

JaredM wrote:
Can anyone report out on how the 70.2 performs in the SMO L6 reflector? Any donut hole? Lux? Thanks.

I posted that a ways back – black hole appears only if within 1 foot from a wall, further than 1 foot – no hole.

Thanks Tom! I’m sorry I missed that comment. I think I actually remember you talking about that now.

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JaredM
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JasonWW wrote:
I’ve got pictures and video of the donut hole shaped hotspot from the 50.2 in my L6 with SMO reflector if you want me to upload them.

I’ll never say no to beamshots. In fact. I think that’s a rule here.. Party

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Here is the 50.2 at lower camera ISO levels with 2 different reflector heights.

With your naked eye the dark center is less noticable due to the intense brightness of the hotspot, but once you start moving the beam around you will see it again.

If you don’t care much about high distance/throw numbers, you can adjust your reflector height to give a better compromise between appearance and throw.

I’ve found a donut hole pattern always seems to give the best throw numbers.

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Here’s a shot with the camera settings more normal.

The dark center is harder you see, but once you start moving the beam around your eyes pick up on it.

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This donut hole is only related to the height of the reflector. If its good focussed and centered, there will be no hole.
You will have this hole on single-die emitters too, if the LED sits too deep in the reflector.

JaredM
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Thanks Jason! I can see it slightly, but it’s definitely something I can deal with. I’m going to finally breakdown and get an L6. It’s starting again..

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So the donut hole is only a slight intensity drop towards the center of the hotspot, and to be expected because the quad die of the XHP50.2 is still not perfectly uniform. But it is nothing compared to the old XHP50 and even acceptable on a white wall.

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I recently built an xhp50 C8 and can say that the donut hole in that is a whole order of magnitude worse. Complete blackness in the middle.

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Wieselflinkpro wrote:
This donut hole is only related to the height of the reflector. If its good focussed and centered, there will be no hole.
You will have this hole on single-die emitters too, if the LED sits too deep in the reflector.

You would need a “not so good” focus to minimize the darker center. IE, bigger corona and less max lux. The pics I showed above have the reflector height adjusted for almost max lux and throw with only a slight difference in height between them.

If I move the reflector out more, I can make the dark center go away. The corona gets bigger and the lux levels drop down, throw is decreased, but the hotspot looks much smoother. So you just have to choose which you prefer. Max throw or a smooth hotspot. I went back to a xhp70 and adjusted my reflector to give a smoother hotspot. I lose a little distance, but am happier.

I think I’m gonna try the 70.2 soon just to try it out.

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JaredM
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Texas_Ace wrote:
I recently built an xhp50 C8 and can say that the donut hole in that is a whole order of magnitude worse. Complete blackness in the middle.

I have a XHP50 C8 as well that I built years back. Right when the XHPs first where released I suppose. Surprisingly, the OP reflector didn’t give the best beam. I have an SMO installed that I think came from FT. I know there are different versions out there, and I’d have to crack it open to check which one it is, but it works fairly well. There is a slight crosshair dark spot but it kinda serves a purpose in my application.. It’s on my 12ga pump with a homemade tape switch that’s switching a FET installed in the tailcap. It’s running direct drive off purple efest 18350s.

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It sounds like yours is better focused then mine since mine is just a hole in the middle but no crosshair. I tried another centering ring and didn’t care for the crosshair so I settled on the hole.

I most likely could have improved things a bit more by playing with the focus but it was just a spare parts light that I was tossing together, I highly doubt I would ever use it anyways so I didn’t bother.

I do so want to put an xhp35 in a C8 with a boost driver though, just a matter of getting the driver and firmware for the new designs to work.

JaredM
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I’ll see if I can’t get some beamshots and pics posted of that light. Probably start a new thread topic and that’ll capture some of my more unique/scratch builds. I’ll post a link here when I get there..

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If I wanted to swap the N4 1A XHP70 with a P4 1C XHP70.2 in my L6 using the stock driver (no modifications), would that work without messing up the 70.2? I keep hearing about resistor mods and I’m a little confused if that’s something that has to be done on the stock L6 driver.

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Flashlights:

x2 Sk68 modded 1 Nichia 319AT, 1 Cree XP-G3 - x1 Solorforce P60 drop in custom XM-L2 U4 1C, Qlight Rev.A 7135*8 3.04A Driver - x2 Lumintop EDC05 CW - x2 Jaxman E2L tripple XP-G2 S4 
x1 Jaxman Z1 Zoomie, w/ Cree MT-G2 Q0 LED - x1 Acebeam K40m thrower with MT-G2 Q0 LED - x1 Xintd SC-82 V5 Limited Edition C8, XM-L2 U4 1C, Qlight Rev.A 7135*8 3.04A Driver
x1 Convoy L6 moded with a Cree XHP-70.2 P2 1D LED - x1 Rare Olight x7 Maurauder with a Nuetral White LED - x1 Astrolux MF-01 Nichia 219c - x1 Astrolux MF-01 Cree XP-G3 - x2 Zebralight SC5w MKII  

x2 Lumintop Tool AA - x1  x2 Lumintop Tool AA 2.0 - x1 Lumintop ODL20C - x1 Lumintop GT mini - x1 Olight i3E EOS - x2 Zebralight SC600w Plus MK IV XHP 50.2 4500k 80 CRI - x1 Fenix CL30R - x1 Lumintop C01 Bike Light - x1 Lumintop Zoom 1 - x2 Zebralight Sc700d - x2 Lumintop Tool AA 2.0 Ti - x1 Olight I3T EOS

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The 70.2 will work perfectly fine with a stock L6 driver. This is because the L6 driver regulates current to the LED. Other drivers commonly used around here are FET drivers. These are very low resistance circuits that allow the LED to be driven as hard as the batteries can push them. The problem arises with the new LEDs because their voltages are lower and the batteries then deliver way too much amperage in this type of setup.

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Sovereign Knight
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Perfect! Thanks for the info! Time to order my first 70.2. Thank you.

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Abs where did you find a P4 1C XHP70.2?

Got any links? Thanks

Sovereign Knight
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Just bit the bullet and ordered a XHP70.2 P4 1A 6500K from https://m.fasttech.com/p/7908401
. The question I have is, the copper star it comes on, is it good enough? I’m not sure if it’s a direct thermal path or not. Has anyone ordered LEDs on copper stars like this before from FastTech? I’m going to use this led in a stock L6 as an emitter swap. Thanks!

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Sovereign Knight wrote:
Just bit the bullet and ordered a XHP70.2 P4 1A 6500K from https://m.fasttech.com/p/7908401
. The question I have is, the copper star it comes on, is it good enough? I’m not sure if it’s a direct thermal path or not. Has anyone ordered LEDs on copper stars like this before from FastTech? I’m going to use this led in a stock L6 as an emitter swap. Thanks!

You bit the P2 bullet…

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Sovereign Knight wrote:
Just bit the bullet and ordered a XHP70.2 P4 1A 6500K from https://m.fasttech.com/p/7908401
. The question I have is, the copper star it comes on, is it good enough? I’m not sure if it’s a direct thermal path or not. Has anyone ordered LEDs on copper stars like this before from FastTech? I’m going to use this led in a stock L6 as an emitter swap. Thanks!

That is a P2 not P4.
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I believe those stars are DTP. I have some bare XHP70 stars from FT and they are DTP, they look the same as what that emitter comes with.

sovereignknight
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Whoops. I ment P2, not sure why the hell I put P4, lol.

Anyhow thanks for the reply on the question about the copper stars design.

https://en.wikipedia.org/wiki/John_3:16 

Flashlights:

x2 Sk68 modded 1 Nichia 319AT, 1 Cree XP-G3 - x1 Solorforce P60 drop in custom XM-L2 U4 1C, Qlight Rev.A 7135*8 3.04A Driver - x2 Lumintop EDC05 CW - x2 Jaxman E2L tripple XP-G2 S4 
x1 Jaxman Z1 Zoomie, w/ Cree MT-G2 Q0 LED - x1 Acebeam K40m thrower with MT-G2 Q0 LED - x1 Xintd SC-82 V5 Limited Edition C8, XM-L2 U4 1C, Qlight Rev.A 7135*8 3.04A Driver
x1 Convoy L6 moded with a Cree XHP-70.2 P2 1D LED - x1 Rare Olight x7 Maurauder with a Nuetral White LED - x1 Astrolux MF-01 Nichia 219c - x1 Astrolux MF-01 Cree XP-G3 - x2 Zebralight SC5w MKII  

x2 Lumintop Tool AA - x1  x2 Lumintop Tool AA 2.0 - x1 Lumintop ODL20C - x1 Lumintop GT mini - x1 Olight i3E EOS - x2 Zebralight SC600w Plus MK IV XHP 50.2 4500k 80 CRI - x1 Fenix CL30R - x1 Lumintop C01 Bike Light - x1 Lumintop Zoom 1 - x2 Zebralight Sc700d - x2 Lumintop Tool AA 2.0 Ti - x1 Olight I3T EOS

Davevo 5k
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Just a quick question please.

Do I just halve the amps on a 12v version to get the same output? Nobody has tested a 12v yet as far as I can see.

Thanks

Dave.

djozz
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Davevo 5k wrote:
Just a quick question please.

Do I just halve the amps on a 12v version to get the same output? Nobody has tested a 12v yet as far as I can see.

Thanks

Dave.


Yes indeed, I have not seen that tested either but everything about how the led is constructed predicts that it works that way
Davevo 5k
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Thanks djozz

So 5.5 amps should do the trick then being as 11 amps is what I have seen mostly what people use in 6v config.

btw this is not for a flashlight set up but automotive use, and will have proper fan assisted heatsink cooler.

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