Look again. The sub-600 is only at the tested current of 350mA. It is actually rated to go as high as 1050mA and over 1500 lumens. With the guys around here, we’ll probably be seeing it going past 2000 soon enough. Still, requiring 11V to get there doesn’t feel right. 3S LiIon can certainly do better. :bigsmile:
Like I said, I know, that Cree isn’t focussed on flashlights, but it would be very neat if they could bring out lower Vf versions of those LEDs. Like the MT-G2.
For 3,xV, 6,xV and 11,xV.
Shouldn’t be a major problem for them…
Low voltage and massive current is slightly nonsense, resistance is a too much of big deal and is the most real thing possible to not achieving good results, that is why everything powerful is high voltage, even the mains in the house.
XP-L HI still has the most average surface luminance per lumen out of all the LEDs shown in the image, so if you want throw that is the way to go, the simple route (no boosting).
I wonder about something as shown in the image: Does a domed XP-G2 has higher luminance (surface brightness) than a dedomed XP-L? Really?
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Not sure about the XP-L HI (so called domeless) so far only low bins have been out via Mouser. But at any rate just calculate to see the percentage increase from 7.8 to 8.2, it is 5.128%, not a monster difference which can easily go into manufacturing tolerances of LEDs.
Remember that number is in comparison to the lumens it gives. So, overall performance is not in that number, but in the wide view of all the numbers. The apparent die size of a XPL HI is about the same as the apparent die size of the domed XP-G2, but the luminous flux is just below double that of the XP-G2. The calculation they use is cd/cm2/lm but they don’t give us the number for cd. If we work the math backward, though, we find that the cd for the domed XP-G2 would be ~5027, while the cd for the XPL HI would be ~8541. So ,the XPL HI actually wins in overall performance. That 7.8 vs 8.2 is almost meaningless in itself. It has to be taken in context.
Based on pictures and some other data,this LED uses weird 4x 1.4mm2 dies,so they are not xp-e (1mm) dies.That means this led has 5.6mm2 of total die area,which is 40% more than XP-L / XM-L2. So it wont throw better than those two.Overdriving would be also less effective because thermal pad is only 1.3mm wide, and effective die length/width is 2.36mm.