Yeah, it’s the biggest die with the most output using a 3.5mm pad. So if you have a street light full of xpl, it can be easily swapped to xhp35 and you get way more light from the same surface area. That’s how I understand it.
BTW, none of these leds are made for flashlights, they are more for street lights and commercial stuff.
I have a small 1x18650 Zebralight that uses the XHP50.2. I also have a larger 4x18650 light that uses the XHP70.2.
Those LEDs aren’t used much in budget lights, due to their 12v forward voltage (and thus requiring a boost driver or several cells in series), but they’re becoming popular for high-output flashlights.
there is no problem in arranging the dies of the original XHP34 to make 6V but they did not make 2 versions, so there is only 12V
they would need to rotate some dies and do the bond wiring differently
I was looking for trower then stumble this. Its XHP 35.2 HI. I dont think or maybe if i miss, there isnt yet a light that use this version. Old version is xhp35 hi without .2.My thought is that, if there any available, can someone name it. My 2nd thought is probably it will be in discussion to made or pre production.
Any flashlight using XHP 35.2 HI ? Flashlight always, for trower,using high intensity led like xhp35 hi and ussually had beam above 50kcd - 100kcd even MOAR. I do know this when xhp70 led been upgrade to xhp70.2. Do check there a topic about this in blf threads.
The 35.2 does not seem to offer much improvement over the current version. Therefore I dont think there is much interest in it.
I haven’t heard of it being available, so maybe when it does come out we will find some type of improvement. Maybe it will handle higher amperage for increased output? Who knows.
A new 3v version of the 50.2 recently came out. Maybe the 35.2 will be available in voltages other than 12v?
XHP70.2 is throwier than XHP70 because the dies are closer together.
That’s not the case with XHP35.2. It’s a floodier but more efficient variant.
XHP35.2 HI? I don’t think it exists and I don’t think it ever will. Just like there’s not XP-L2 HI.
XHP35.2 might be interesting for some small flooders - but for throwers? I don’t think so.
I don’t think this is true. The big difference you see is that the xhp70 has a darker hot spot center, while the 70.2 has a smoother spread of light. Check these pics at the same distance, same light, but different leds. This is with the exposure turned down to highlight the hot spot smoothness.
The actual throw distance doesn’t change much, but of course the 70.2 is capable of outputting more lumens which can increase the throw a little.
The closeness of the dies doesn’t seem to have any effect on the throw distance.
Since it looks like the 35.2 has the dies a little further apart, we might see a little more of a dark spot in the center of the beam. We will have to wait and see if this is the case or not.
According to CREE PCT, the XHP35.2 has lower lumens output than XHP35 of the same bin until you reach 1A current, for some reason. Then, it starts to take a slight lead in output. But the XHP35.2 has a lower Vf than the older XHP35 version, so it will be more efficient. On the low end, the XHP35.2 even has worse lm/w efficiency than the XHP35 up to 250mA, where they have equal efficiency. Above that, the XHP35.2 has better efficiency. So, it’s a mixed bag. The only measurement that stays consistently better is the lower Vf at each level of current usage from the bottom of the chart to the top.