I just requested that this light be on the Deal extreme offers page for a discount. So keep an eye out! Ya never know. Others should do the same. There are enough of us on blf that we can request certain sku's and they will see what is in demand. The sku for this fandyfire hd2010 is 107154
This is a popular model, owned by many : http://www.dealextreme.com/p/digital-lux-meter-with-stand-200000lux-5100
With a luxmeter you will always measure the output, and how the reflector and the glass come into play. Tailcap currents are relative, the multimeter's resistance, leads resistance, driver efficiency, etc. The glass can cut even 10% of the lux, at that point approximating the throw and the brightness on the tailcap currents is not accurate at all.
Also, it can show 4A on the multimeter but if the driver has a 75% efficiency that's is 3A to the LED.
On the emitter side (above), the OD of the pill appears to be approximately 32mm, and it looks like it screws in from the top. I think this side has a lip that seats on a ledge on the inside body of the head. The board on the top has an approximate size of 15mm. This was taken as a rough measurement across the white disc covering the emitter board.
On the driver side (above), the driver appears to have an approximate size of 17mm, but this measurement was taken from the OD of the aluminum ring that appears to be holding the drop in in place from the underside of this pill. The indents on this ring are not very deep, so screwing it off might be problematic for me unless I deepen them. Yes, that little scratch is evidence of my one short attempt at screwing this off to get a look at the inside.
As can be seen from the markings, the driver board is marked East-092B. The pill from this underside is approximately 29mm in diameter (maybe the threads add another 1mm?).
Don't forget that the C88 here was modded with an XM-L and was not a standard XR-E Q5 C88. Given this is it that surprising that the XM-L light with the huge reflector size advantage, the 2010, walked all over the other XM-L light, the C88?
Another question: The U2 bin XML on copper - is that the one from ledtech.de ? (As far as I remember) that you wrote about in another thread (I found the best U2 you wrote - or somthing to that effect)
And a third - could you show a picture of the "bypass" operation on the springs? Is that "just" a matter of getting some copper wick/wire soldered to the top and the switch?
Thank you for your time Andi, it is really nice of you to share with us all like this :bigsmile: