I have been working on an XHP70 version of Giggles for awhile now. I first tried a normal XHP70 but it has a bad cross in the middle of the beam and the performance was just ok. Not worth keeping in the light it was so ugly.
I just got my first xhp70.2 thanks to Lumintop and here are the results:
I just posted the XHP70.2 P2 4000k test here: XHP70.2 P2 4000k Output test by Texas_Ace - it's over 9000!! lumens and still going strong!
It was so powerful that for the first time my my CPU heatsink could not keep up. The results above ~18A I think could have been slightly better with a better heat sink.
I also played with the focus some as well and it can be improved, although the prototype mcpcb needs a wire running on the surface and that keeps me from getting the reflector any lower. In testing with the external LED I think the beam would be improved some by lowering the reflector a bit more.
That said even with the reflector setup like it is now, it is still perfectly usable. The middle of the hotspot is just a bit darker at range.
Now for what ya’ll really want to know, what are the numbers?
As you can see from the above thread, the lumen output at 5A is just over 7,000 lumens! (more on a cold start)
I have a 40mohm sense in it right now that gives me a max of 6A in turbo and 4.8A at the top of the ramp. At 6A it is almost 8000 lumens!
The driver does get properly hot at 6A. 5A looks like it will be ok long term though. he nice thing is that the Narsil thermal regulation can act as a safety for the driver in this situation if the thermal calibration is not reset too high.
Measured throw in my less then ideal Texas conditions are about 1250m of throw at 5A and a bit over 1300m at 6A.
Although that could change with final focusing.
Overall, I REALLY like the xhp70.2 in the GT. I will try to get some beamshots when I have some free time but it basically just looks like a larger version of the stock xhp35 beamshot at close range.
At longer range it does have a bit of a dark spot in the middle of the hotspot but not enough for me to not use it. Some focusing might improve that as well, gonna have to wait until dark to see what the changes I made today did.
I will be leaving the prototype with the XHP70.2 for sure. Although I also have an 80CRI version sitting here that I think I will try out.
As far as the parts needed, it would be much easier if lumintop releases a pre-made mcpcb or if we make some ourselves.
Right now it is using a modded version of the SD75 mcpcb, others have mentioned that maxtorch might have a better mcpcb option.
This is the design I sent to lumintop awhile back:
Then you naturally need the XHP70.2 LED. RMM has some Cree XHP70.2 P2 4000K on DTP MCPCB
And the sense resistor, a R050 2512 will put you just under 5A in turbo and be a little easier on the driver. An R047 will put you right at 5A but is a little harder to find.