I wonder if the rather small amount of more efficiency on CULNM1.TG / CULPM1.TG will be advantageous if used in a multiemitter array, e.g. underneath a quad optic. I hope to seeing some flashlights using CULNM1.TG underneath a Carclo 10621 optic anytime soon. Maybe Hank (KR4/D4v2) or Sofirn (IF25A) can offer something like this. Acebeam is using CSLNM1.TG (White Flat 1) in their TK16/TK18 lights.
LEDs: Osram White Flat 2.1 4040 Boost HX
Driver: MTN-17DDm (w/ Bistro firmware)
Optics: Ledil Angie
Lens: UCLp AR lens
~77kcd
~4470lm @ 3s
5500K CCT
Yes, very nice work. 
Actually, I hope it can also be done with a 10mm lens as LEDiL ANGIE-S is a bit larger.
Is that a 3535 board?
Yes 3535. I had a mosX 4040 board I took some Luxeon Vs off of but I kept getting shorts I couldn’t fix.
I’d guess using 4040 LED’s might not be worth it on a smaller build since you may not be able to max them out anyways. I ran this one w/ FET enabled using a VTC6, yolo.
3x Osram Red Flat (CSLNM1.23)
MTN triple 3030 board
lume1 buckboost driver
lume1 RGB aux board
Wow, niiiiice! :THUMBS-UP: :LOVE: I got to have one of these! :)) Maybe I should ask Hank to offer his Emisar D4v2 using a triple board with KR CSLNM1.23 or KW CSLNM1.TG using 10507 or a quad board using 10621 along with his 7.5A constant current driver (w/o direct drive). That would be a perfect add on to his custom builds using SST20-DR.
Anyway, thanks a lot for sharing!
I’m surprised they didn’t float around during the flow…
They do some but if you use less solder the friction will keep it in place well enough to manually center. Im sure it’s not perfect but definitely close enough for a TIR.
I used a toothpick and rolled the tip of it on the side of the emitter to push/center it. Hands are too shaky to use tweezers from above
Those are the emitters from the Yinding store?
Yes
I don’t think there will be much difference in multi-emitter lights. They don’t tend to drive the LEDs to the max anyway, so amps per LED are not near the limit.
Unless the light is large.
With single LED lights you can drive the LED much harder which was a problem with 3030. It may still be a problem with 4040 but the limit should be higher.
Problem is, some (cough! many) of you still use unregulated drivers, which is just (sort of) wrong (no matter what).
In other matters, in a sort of related way and conversely, people like me believe in being impervious to Covid-19. Did it nearly from the start. Awaken to your spirit (or better, to the reality of the soul). Learn to believe. The sooner you do the same, the sooner this sort of Zelda Majora's Mask tale will end.
All the best,
The Light. 
Just like you Barkuti I’m not a fan of direct drive. But with limited choice on the market that’s what I tend to choose.
Times are changing, availability of regulated drivers increases. Still not with Andruil….but these will come as well.
I swear into this diy FET DD driver as the best for certain setup(1x18650, 1x emitter setup) maybe not perfect for this new Osram emitters (but it could be reworked if we restrict current over the fet to around 4.5A) but for old XPG2 in mentioned setup is really, really the best, unbeatable…
The problem I have is that AK-47 C1 driver (firmware with high,med,low no memory effect) disappeared from the market… So for me that means “GAME OVER”.
I would take 17mm regulated drivers (4.5A on high) but I need high, med, low mode without memory effect so it always starts on high… I don’t want to mess with re-flashing and reprogramming or any kind of fiddling(short press, long press, 5 flashes etc.) to get into that…
So we all have wishes and preferences… My vote, but only for mine mentioned type of setup goes to above mentioned type of FET DD driver.
Mmm, the standard 4 modes ∅17mm 5A driver is close, but I guess close is not enough, namely because of the low to high mode order. It's maximum driving current, being slightly below 5A, is spot on for the fashionable CSLNM1.TG, though.
I understand the preferences thing, I know how the mind works and when one believes something could happen, it's only a matter of time for it to happen. Thus, to completely preclude driver misconfiguration wise or pragmatic man sticks to unmessable driver. :-D
Does the lower VF bins for Osram KW LEDs mean longer runtime on battery ?
This statement is too vague to answer as is. A buck or boost driver may benefit from low vF while a linear driver may have no impact or slightly worse and a FET driver may be worse still (as far as runtime).
“Efficiency” is in the datasheet for each brightness bin but it all depends on how you power it.
I see, so this cant be stated until you know your flashlight setup, specially with driving these LEDs way above the default current.
Right, usually you will pick two and figure out how to make the 3rd work with your first two choices: LED, Host, Driver
We only have so many resources after all.