To those who just posted; Jeff, Artiet. This is still just idle banter without anything close to fixed as a design. I’m just projecting my thoughts on the look.
18x XHP50.2 or SST70 with an efficient driver would be nice. Always wanted an X80-GT but I can’t justify the price and there are no cheaper alternatives.
Edit: I guess we could make two versions, one with 7 emitters and one with 18.
High CRI, warm tint and I’d consider it… though I really prefer a longer, slimmer host than a popcan light.
How about 21700 using loneoceans new boost driver the Lume X1?
It seems like it can run in boost mode up to 40W, use Anduril firmware. A nice high quality XHP70.2 or XHP50.2 with the same Ledil olga optic he use will be perfect in my opinion.
:person_facepalming: :person_facepalming:
Are you sure?
(Those emitters only has quality, when they are dedomed and excess phosphor around LES is removed, but I am not aware of any manufacturer willing to do that.)
Would be interesting, but 3×21700 could qualify for much more powerful designs as well. 40W could be good for a 3 × SST-20 95CRI thrower, or any other flashlight design with at least 18-20 × E21A.
Kaidomain dedomes XHP50.2.
For which optic this cadavre wold be adopted?
Additional one flash FL? No any 3000+lm can be efficiently dissipated in near soda can size. May be 5000lm in night cool weather.
If the optic would be floody,that even with 15k lm the real distance would be not amazing. And if optic would be throwy, it wouldbe uncomfortable in close distances.
The future is on FL with chageable light distribtion (not lens zoomer )))), with such light ability
I think you are correct. From what I read, the XHP50.2 and 70.2 have very high efficiency for lumen / watt, and the CRI is high. However it often has green tints.
Maybe the best idea is using new B35AM from Nichia but I have not seen it before in any flashlight.
3x21700 would mean a minimum 46mm body ID, so ~50mm (2”) OD, the same as a 4x18650 light 
With a body-diameter sized TIR and a CULPM1 LED it would be possible to get close to 0.5Mcd 1400m ANSI range, but only at less than 1500lm.
Using a SBT90.2 could be pretty cool though, if you could drive it at 5k+ lumens using high drain 21700 cells.
Not really. CRI is not high for any of XHPxx.2 . Yes, they are efficient, but even the highest CRI class usually gets measured with R9 under 50 (I remember seeing it 39 for XP-G3, which has mostly identical phosphor technology).
Still, I would accept that for some cases, but without the changes I mentioned (which was implemented already by a few members here, most notably ZozzV6), tint shifts are so huge across the beam, that it shall be called CreeRainbowPuke™.
Oh, thanks for the info. It is request based for each order, or it can be ordered like a separate item?
Just an observation. I picked up the Astrolux FT02S recently and it’s max output is with the Samsung 30T. That’s 3000 mah where as a triple 21700 could do the same with 3 Samsung 50G. So instead of triple capacity you now have 5 times the capacity with the same brightness.
Imagine a 95+ CRI floodlight with 6-9k lumens:
http://kaidomain.com/Cree-XHP50_2-De-domed-White-6500K-LED-Emitter?search=xhp50.2
Yuji COBs are dense but terribly inefficient. 
Most high CRI leds are very inefficient, no?
Am I reading that correctly? One led for $99?
No. Yuji are special. This one gets 60 lm/W. I don’t remember the exact numbers and don’t care to calculate again but even heavily underdriven it stays very inefficient.
F.e. Nichia NFCWL060B-V4 offers the same CRI with 135 lm/W. Even warm Optisolis is 110+ lm/W.
ADDED:
Nichia NVCWL024Z-V1 has 11 mm LES, so 21% larger area.
It makes almost 14000 lm with ~78 lm/W. CRI 95min as well.
At the rated current (1.2A) it gives 4980 lm with 117 lm/W.
My crude chart read gives it 146 lm/W and 2340 lm at 500 mA. Might be significantly incorrect but the max efficiency is much more than 117 lm/W.
Note that both Yuji and Nichia do their ratings when the LED is cool.
They have another one for $1350
https://store.yujiintl.com/collections/led-cobs/products/yujileds-bc-series-high-cri-cob-led-900h-1500w-pack-1pcs