Thanks Enderman.
Will be using 4 of these Redirect Notice
CSL8025MP
2 will be used for 2 XHP70.2 other 2 will be used for 2 CREE CXA 1850 arrays.
Looks good.
I installed an XHP70.2 N4 5700K on a maxtoch 32mm (mtnelectronics) in my chimera. Downsized the wires to 22 awg and used a few extra inches of wire to add a little extra resistance and eliminated one of the 22 awg jumpers on the tailboard. With 2s4p ncr18650b powering the TA srk driver from Lexel all I can say is “WOW!”, even looking at the beam on the white wall in the middle of the afternoon. I made the mistake of looking at the beam on the wall a little too long and had artifacts in my field of vision for several minutes. Not too fond of the yellowish corona but otherwise it’s a nice beam. I guess I need to cobble together a fixture to measure the output.
Looking forward to seeing the output after it gets really dark outside.
just sliced the dome of a xhp70.2, but found only 2 of the 4 led are turning on, not sure what went wrong. anyone with same experience?
Low voltage?
Hey guys,
Fasttech has XHP70.2 N4 3A in stock.
https://www.fasttech.com/p/8287200
3A is the best tint i.m.o.
Has anyone done a current / output graph on the XHP70.2??? Have a link? Thanks! 
Djozz tested one but never posted the results as he was getting slightly different results then TomE and some others IIRC.
From what he said it sounds like it pretty much mimics the XP-L2 in the curve though, which makes sense, it is 4 of them put together. So you should be able to roughly look at the XP-L2 and multiply it by 4x.
Yes, as usual I tested one led, and it had its maximum first at 12A and then I reflowed and mounted the same led again more carefully and its maximum was 12.5A. But both Tom and Kawi (in their flashlight builds) reported an output increase when going from 15A to 20A, so that made me doubt about my led and/or my test set-up for these extreme high power leds. Unfortunately these leds are costly so I had no spare one to sacrifice.
If I post my test results they will have to be accompanied by this consideration but usually my graphs are used without the story so until I sorted out where the discrepancy comes from, I rather not post anything at all.
What output would you expect to see from an XHP70.2 in P2 Bin when driven at 5Amps? Thanks!
Rough guess would put around or slightly over 4000 lumens if I had to guess.
Sorry Alex, I’m not at home for the next 8 days (holiday with family in Cornwall, fun in classic cornish weather: lots of rain and wind :party: ) so I have my data not at hand.
Hi all,
Do these emitters display the same nasty color blending issues that XPG3 does? One color (pink usually) in the center with another orange/green color round the edges?
Yes, I have a XHP70.2 P2 1C tint the main beam is has a nice cool white uniform color but the corona has a yellowish tint. 
Kind of like this, Credit for the image goes to member wkhchin81
Thanks Alex. I can see the pink around the hot spot there too. Man, I cant remember when I got so picky, but it sure makes things a challenge. 
I just put a xhp70.2 p2 1d from Mountain Electronics in my L6 with a TA driver running narsil from Lexel.
It pulls 17.3 amps after 20 seconds from a couple of liitokala 26650.
I’ll post some beam shots later directly comparing it to the xhp70. So far it seems to have a less noticeable donut hole shape.
Has anybody run “the test” on these yet to see where the point of no return is on current?
Hard to say. With fresh cells in my L6 and pulling 17.3 amps, I’d say 25 to 30 seconds is all I’d be willing to run it at full tilt. It gets hot really quick.
I’m glad I’ve got the ramping firmware so I can dial it back a bit and save full power for special occasions.
If a person wanted to push it harder, at say 20 or 22 amps, to find the limit, how would they do that? Use a power supply to increase the voltage?
My quick, “just out of curiosity test” it seemed to tap out around 21A or so, with substantial cooling…
He is using a TA driver IIRC, so the losses in the driver are very minimal (the same as a few inches of wire). It doesn’t actually adjust the power, it simply turns it on and off very fast so it appears to dim.