XHP-35

great test - thanks for collecting the data for us!

The best I can make out is that the output at 1. A. and nominal 12 V. is less than the XM-L2 output at 4. A. and nominal 3 V. So the main reason to use it is if you prefer a 12 V drive. That is less likely to be an advantage in a flashlight than in other lighting applications, but it might be important for such reasons as not having a low resistance switch that fits a particular light, or if one needs four cells to obtain the desired run time and doesn’t have an efficient buck driver.

Take another look at the charts and Crees tool used for calculating output. Watt for watt the XHP35 HD puts out considerably more than the XM-L2. I’m talking about relative bins, top end to low end on both Leds. And yes 12 volt system does offer some advantages over the lower 3.0-4.2 volt lights (less strain on switches, less need for heavy wires and springs, less resistance sensitivity). I believe more emphasis will be placed on 12 volt Leds as they work so well in cars, campers and dc wired homes that usually run 12, 24, 36 and 48 volt.



Probly none that you will find all that useful. I used up all my XHP-35s so all I have left is the one installed in the light. I went ahead and ran that and the XML2 de domed again to get the VF, but none of the watt intervals really intersect.

(sphere recalib for .34 multip. (bench supply used)
Cree XM-L2 U4 de-dome in Shadow JM26 head Volts watts Lumens per watt
1000ma 380 3 3 127
2000ma 683 3.3 6.6 103
3000ma 969 3.5 10.5 92
4000ma 1179 3.7 14.8 80
4500ma 1285 3.9 17.55 73
Lux tested @ 1 min 238,500 on 26650 cell
Cree XHP-35 HI C4 in Shadow TC500 ( bench supply used) Volts watts lumens per watt
1000ma 1030 12.9 12.9 79
2000ma 1526 14 28 55
2500ma 1564 14.6 36.5 42.8



I would imagine if I had data at low ma like I do for the XML2 it would show the XHP35 out performing the XML2 by a good bit. However with its smaller footprint driven very hard ( like we all do) in a flashlight it really doesn't do any better in lumen per watt.

The head of the XHP-35 light heats up a lot faster too. If I decide to get more of these I may run some more side by side tests in bigger lights for a slightly more stable top end.

I think the heat generated is almost exactly equal to the power consumed minus the power that comes out as visible light. Some infrared is radiated because of the heat and some maybe due to impurities or defects, but those are very small corrections. Since the efficiency is about the same, the heat is just proportional to the power in.

Ya with more than double the wattage at maximum it takes about 5 seconds before you start to feel it getting gently warm. By the 2 minute mark it would feel good on cold hands in the winter. Since my new batteries came, I may see if it can handle some 5-10 minutes like that.

Nice work. Much appreciated data! :wink:

I have something coming for that good ’ol XHP35… Come on Mr UPS man.

i did a testrun today...

XHP35 on noctigon XP-G , not good centered (in depth) strapped on a Ledil Seanna

powered from a LD-2 piggybacked on a 4P->4S converted SRK-clone (LD-2 gets 8.4V)

20cm long cables to the LED / bad heatsink / messy.....

meas@3m calc@1m manufacturer
Fenix P36TAC 1344 lx 12096 cd 10000 cd 0,826
acebeam K60 17000 lx 153000 cd 124100 cd 0,811
1405 M4D 52000 lx 468000 cd
XHP35 118000 lx 1062000 cd 849600 cd <readingx0.8

not bad - or is it?

Where to get an XHP35?

Here are the HO
http://www.mouser.com/search/refine.aspx?Ntk=P_MarCom&Ntt=124789737

Here are the HI with no dome.
http://www.mouser.com/ProductDetail/Cree-Inc/XHP35A-H1-0000-0D0BC40E3/?qs=cGEy3R83DS%2f0kgKhDWhVQw%3d%3d


Digikey also has some
http://www.digikey.com/en/product-highlight/c/cree/xlamp-xhp35-leds


Cutter has some on MCPCBs and bare
http://www.cutter.com.au/products.php?cat=Cree+XHP35

Thanks,do they ship to China? Price is good. I also conatcted Hank @intl-outdoor. Hope he has some.

I bought a TrustFire X6, will mod it with XHP35.

Edit: the shipping is killing.

i ordered from cutter.

just get over 100 $ :wink:

It sucks if they use the one-month snail shipping.

Price:7.99

5.64USD (what is this for?)

It says Alum star? I thought Noctigon is made of copper.

mine was shipped with dhl (4 days AUS-AUT)

i bought the HI Version
one on a aluminum star and a bare one (had solder on the contacts - i think they took it off from a star )

That's pretty fast. Do you know what is the 5.64$ for? And is it an aluminium star instead of what the pic shows "Noctigon"?

Edit: Sorry, I just noticed that the HI version is on alum star. Is it a DTP ?

their prices are australian dollars :wink:
so its cheaper a lot transfered to USD

for the other questions you have to contact Mark (username welight)

ah,AUD, thank you. It's an Aus based supplier. Price is really good, is it? the other stores sell the bare LED at 7USD,and no free shipping at all.

I bet the X6 would make a great host for the XHP35. Did you find an additional extension tube that will fit to make it 4S?

I had the same idea for my X7 but cant find an extension tube that would fit.

Damn, 3S could work, but not as better as a 4S. Will be checking TF if they can sell me another tube.

3S is not enough
not even with HE2…