Finally the XHP70.2 emerges!

Speed4goal, you are absolutely right, OP is not bad at all. But for further reach I should have bought a SMO reflector. Should have made that point clearer, sorry.

Nah no one is wrong but basically with this new style XHP it will be more suited to using in an smo reflector then the standard XHP. There should be no donut hole with the updated version. The die should be more uniform Maybe making l throw better who knows.

70.2? It will be just like the XP-G3, L.2 and 50.2 High Output High Heat No throw! These emitters from my experience are not that great in flashlights, well not for my purposes any way, I like a big beam, with down range grunt, not really a fan of just out put, flood with out throw. Did not like the 50.2 J4-1A in my L2 at all, crummy hot spot yellowish gold corona, and it got worse when I shaved it, now this is comparing it to my other L2 similar build and tightly shaved “old” J4-1A emitter. So I’m not bothering with the new 70.2, I’ll keep my stash of (10) or (8) now XHP70 P2-1C emitters guarded carefully!! :smiley: :+1:

Want more throw de-dome the old XP-G2, XP-L, or even the XHP35/50/70, (not just shaved) you can’t do that with the new emitter’s! I have tried!

I’ll live with the minor artifacts of the “old quad die” emitters and the ability to de-dome them for more “throw’ any day!! :wink:

Just my .002 Cent! :laughing:

Looking forward to the Convoy L6 Mk2 then :wink:

With all this extra output, manufacturers need to concentrate on better heat sinking. I find high output lights rather pointless if they have to stepped down quickly to avoid over heating.

+1

Hmmm…
At some point some professional markets will want to have modern LEDs that can be used in pure throwers, like search lights, don’t you think so?
I find it quite strange actually, that the developments in LEDs are apparently going in a different direction.
Matter of time maybe.

Momentary turbo button.
You’ll let go when it’s too hot and it can’t accidentally be left in turbo mode.
just an idea…

Interestingly, Led Lenser has this feature. Press and hold for 130% output. It’s barely visible compared to 100%, though I do like the idea of this feature for more powerful lights.

:+1: Looking forward to the highly efficient, higher output street lights! :person_facepalming:

lol :smiley:

Convoy L8 right around the corner!!!… oh geez just take my $$ now!!

I was using the ledlenser P7.2 momentary button last night for creating lots of starburst effects in a light painting photo.

I want this on an Acebeam K60

I extrapolated the two V vs I curves and for the 6v emitters, reaching 12 amps will take approx .75 to 1 volt less on the 70.2
Running 2S direct drive won’t be possible anymore due to extremely high currents at 7.4v that would kill the LED instantly.
Although 3S on a 12V emitter will be excellent for direct drive.

I think cree will go in the direction of factory de-domeding more LEDs and split the market up.

Unfortunately I don’t think running 3S on a 12V emitter will work. The XHP50.2 forward voltage is consistent with it being four XPG3 dies, so I’ll assume the XHP70.2 is four XPL2 dies.

From Texas_ace’s test of the XPL2 the forward voltage at 6A is 3.56V. In a 12V configuration that is 14.24V. 3S voltage is just too low to get good high current.

3s ia 12.6v max.
Go look at the graph, that would be 4A+ at full charge.
http://www.cree.com/~/media/Files/Cree/LED-Components-and-Modules/XLamp/Data-and-Binning/ds—XHP702.pdf

All i know is there are HI versions of XQ-C XP-L and XHP35, but that’s it.
You would think though that shaving / slicing / wet sanding the dome down would be the same result, but apparently it is not, or not always…

Based on Texas_Ace’s measurements of the XPL2 the forward voltage at 4A for the 12V emitter is 3.34V*4=13.36V. This is different from your extrapolation of the curve in the datasheet. From what I’ve seen this sort of data in the Cree datasheets has been not completely accurate. For example the cree data says the XPL2 voltage at 3A is 3.125V while Texas_ace measured 3.20V. Also it doesn’t look like you took into account the voltage drop for the batteries at 4A, which would be around 0.4V. I think you will get significantly less than 4A on a full charge, probably more like 2A.

3.2v is really darn close to 3.125v.
Also, if your batteries are dropping .4v at 4A then sorry but they are horrible batteries.