The problem is that this kind of measuring is very inaccurate. You get the right current when the resistance of the tailcap and the DMM is the same, and the DMM is accurate of course. If you use short and thick leads, sometimes you will measure much more current than the real when the tailcap is in the place, because the resistance of the tailcap is higher than the DMM+leads.
Vice versa if the resistance of the DMM is higher than the tailcap you will measure lower values.
So it would be the best, if you could equalize the resistances. But these are very low resistances, and hard to measure.
Do you understand what i want to say? My english is not good.
Are you sure those are two different X9? Man you sure are fast, both photos taken within the same seconds of 26th minute of 19 PM. And an exact perfect match on the hotspot? Looks like it's medium then high on the same X9. Great job I guess.
My lead aren't standard. I use leads that have banana clips on the ends. The wire isn't particularly thick (maybe 16-18ga.) and they are 1m long.
EDIT: I just measured with the stock leads and could barely hit 2.0A.
Further EDIT: I have 2 DMMs, and if I test the resistance of one DMM with the other I get between 0.0 and 0.1 ohm with the banana clip leads and 0.5 ohms with the stock leads.
I tried my X9 with 2X16340 and burned both driver and led. So, because i couldn't find a replacemend led with 32mm board, i sticked an XML with smaller board to the back side of the original 32mm led board.
Also changed driver with KD driver:
Please forgive me due to bad pictures taken by my cell phone :) . Because i don't have a good camera, i couldn't put a picture of throw but, i will show you the picture taken from googleearth which shows the most far distance that my eyes can notice:
And this distance with demaged reflector surface. I dont know what happened to the surface. Is it possible because of too much heat dissipated from led?