Thanks again Scaru. It’ll end up in my files when its finished.
I was never really sure what an S2 was since I rarely see them on my shopping research. I thought maybe it was some older XP-G design. Why aren’t they as common as an R5?
Excellent thread and info Scaru - thanks for setting this up.
… and have a Merry Christmas mate!
Andrew
Thanks for this. One stop mod reference shop again. Thus is great info. :bigsmile:
Wow, I made that thread 2 times in one day. ;) The reason the S2 bin is rarer is because due to it being a very efficient LED it is not produced very often.
To explain that statement, as I understand it Cree simply produces a bunch of LEDs and then tests them to find out whether they are R5 or S2 along with what tint. Naturally the more efficient ones are rarer.
Bump to ask if there are nay other LEDs I should add. It currently has XP-G, XP-G2, XM-L, XM-L2, XP-E, and I'm doing XP-E2 right now.
That’s good for me to know. So S2 is kind of like the creme de la creme over an R5?
I’m not sure, but I think maybe my Eagletac XP-G minis may be S2.
XR-E EZ900?…I’ve got one in my Javelin.
IIRC, they did make a batch with S2s. Do you have any requests of other LEDs to add?
That's under XR-E. It's basically 1 of 2 kinds of XR-Es.
Sorry, I came right to the last post and didn’t noticed you had already added to your thread.
useful…very useful…thank you. merry x-mas
Ok, I think it's done unless there is anything else I should add. (Maybe Nichia 219)
I just got my very first Nichia 219 flashlight today.
anything that is red or green please. xp-e, xr-e, pt-54, cbt 90, sst-90, luxeon, led engin.
ho…ho….ho….meeerrryyy chrismaaaaas.
scaru, nice work, but you are wrong about the bond wires. Those are, as it says, the small wires running to the die. But I have no idea about the grid..
Great info scaru, I wish they still made the EZ900 LEDs 
Nichia 219 added!
Changing it now, thanks.
Dereelight is still installing them in their flashlights.
I read that those lines on the die are called current-spreaders.
Scaru, a couple quick things.
–92CRI 219s are ~4500k, rather than 5000k.
-the XP-E output versus drive current graph is for a green XP-E. I recommend making a note of that in your commentary.
-XR-E typically has a higher forward voltage than newer LEDs (namely XP-G, because Cree recommends both emitters are fed a max current of 1.5A) for the same drive currents. At higher drive levels, the XR-E’s Vf increases dramatically compared to the XP-G because the latter is more efficient (a lower Vf yields lower wattage at the same forward current).
Nicely done Scaru. Everyone new to LED flashlights should read this. It is the best compilation yet of all the commonly used LEDs.