Customers aren't able to specify which bin they want, but in the past, I know it has been listed on the package.
The last warm Yuji's I got in a group buy were their F5-1 bin, which is above the BBL, but still looks excellent to me. I wouldn't call them green at all. More golden than anything.
In comparison, I have another light with a high CRI Cree XM-L2 at 3000K that looks slightly yellowish. I think of the Yuji's as "cream flavored" and the Cree as "lemon flavored."
This makes sense if you look at a chromaticity diagram. You'll see the tints above and below vary depending on the color temperature:
Below ~4000K: yellow above, orange below
~4000 to ~7000K: green above, pink below
Over ~7000K: cyan above, magenta below
All that said, try not to overthink this. All the Yuji's I've seen: from two separate batches of 3200K and one of 5600K in the 5mm, and one of 3200K in their 10W COB look excellent. I don't have the equipment to do the really nice measurements Maukka does, but I'm confident that their deviations from the BBL are fairly small, and there is minimal variation in tint across the width of the beam.
Yes, that was me :). These LEDs are way beyond any other 5mm LEDs that I have ever seen in the last two decades.
djozz is the one who deserves credit though for finding and posting about them in the first place!
This is a great undertaking and I would like to thank everyone involved!
I am just wondering if there is any international shipping option, also I am not sure I understand the logistics. Anyway, I’d be in for several.
One note regarding the choice of emission angle and such. I was able to mod my e01 with 45 deg 3000K yuji and I feel that the spill created by the “reflector” actually spoiled the perfect beam of the led. I think that the 60deg would make things worse in this regard. So I would suggest that regardless of the led chosen, the business end of the light should be blackened.
Also the tint of the 45 deg version was almost indentical to the incand while that of the 60 deg version was clearly on the “pink” side so one would see it cleraly that this is an LED light. Just for those who prefer incands.
I communicated a preference for 45 degrees to Sofirn, but my estimate is that there’s a good chance it will be 60, because that is what they ordered sofar, and I fear that the 45 degrees versions are not even available from Yuji now. But my feeling from what I read in this thread is that it is not problem enough to stop the project.
I will ask Barry if they would experiment with the shape of the “reflector”, in the E01 it is just a plain cone which may be good enough for the narrow beam of the Nichia led, but perhaps a parabolic shape, even with the rough finish, would add to beam quality.
Definitely not! I am just in favor of the pure beam of the led itself, so if there is a chance ghat the business end can be blackened I personally would prefer this.
Have you tried a yuji in a mag aa? This is an example of what a reflector can do. Very useful beam btw, by far more throw. But I see something special in the original beam, too. Just my personal feeling
I’d be in for 3 3200k and 3 5600k. Thanks to all who contributed to this project.
For those looking for pocket clips, Streamlight Microstream clips work great for pocket and hat brim use on the Fenix E01. Hopefully they will fit these as well.