Cree, Luminus, Seoul Semiconductor, and Nichia LED comparison

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 :frowning:

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).
:wink:

Nicely done Scaru. Everyone new to LED flashlights should read this. It is the best compilation yet of all the commonly used LEDs.

Thanks for all the compliments guys, I figured this would be a good thing to have so I made it. This along with the tint, brightness bin, CRI thread ought to cover most of the newbie questions about LEDs.

I just wish there was something like this when I joined up. ;)

This! It should save inquisitive members a lot of searching and reading.

Just fixed those things Slim, Thanks!

Most of them that Illumination Supply has been shipping lately seem to be in the 4000K-4200K range. Units from earlier batches measured in the 4400K-4500K range. Looks like Nichia users get to play the tint lottery along with the Cree users.

Printed & archived!

Oh wow! This is just the sort of thing I’ve been looking for to get my head around the model numbers. The only other thing I would like to see if possible is the data for SSC P7’s or any other model they do worth looking at.