D4V2 is now available with E21A High CRI LEDs 
https://intl-outdoor.com/led-flashlights/emisar-d4v2-e21a-high-cri-edc-18650-flashlight.html
I did not see my question answered anywhere, apologies if I missed the answer.
Does D4V2 firmware (by default) support tint ramping?
More specifically would a mixed tint D4V2 (2*2200K + 2*3500K E21A emitters) running the NoFET firmware (by default) support tint ramping, allowing for tint ramping between 2200K and 3500K?
No. Actually driver hardware doesn’t support it. If it did - changing the firmware is not terribly hard in the modern Emisar lights.
Thank you very much for your answer, I was about to take my chances and order a mixed tint E21A D4V2 specifically hoping for a tint ramping capability.
Would you be aware of any Anduril flashlight with E21A that is tint ramping capable?
AFAIK only the LT1 supports tint ramping.
Sofirn IF25 (NOT the “A” variant) does as well.
But it’s not Anduril.
The LT1 is the only Anduril light I’m aware of which does tint ramping. If I understand correctly, the IF25 has tint ramping but no Anduril, while the IF25A has Anduril but no tint ramping.
I think what happened was, during the LT1 development process, there was some miscommunication. BLF provided a driver and firmware, but sofirn thought it was only an idea or a suggestion, so sofirn designed a similar driver and firmware based on what BLF sent. Then we got the confusion cleared up, and produced the LT1. However, sofirn wanted to do something with their version, and turned it into the IF25.
At some point another version was made, the IF25A, with a different driver and no tint ramping. I don’t really know any of the details though, since I only discovered its existence a few weeks ago when someone asked why its thermal regulation didn’t work.
Thank you to everyone for your answers. I already have the LT1, and was hoping for tint ramping in an Anduril flashlight I could EDC. Would be nice if this becomes a more widely available feature. Maybe in, say, D4V3 whenever that comes out… Tint ramping together with higher regulated current would be fantastic.
Totally forgot about it not using Anudril, great point Sammy and TK.
Well that is the best excuse to edc the LT1 
I’d be on board with that. I’d love to have that feature, and it would finally provide a compelling reason to use a quad instead of a triple.
Aside from allowing adjustable CCT, the other nice thing is that it pulls the tint down toward pink. It usually makes things look nicer, by avoiding the “lemongrass” tint effect on a lot of recent LEDs. This is because the color space is curved… but tint mixing happens along a straight line. For example, when mixing 2700K and 5000K:
I’d like to see a D4 with 2x5700K LEDs and 2x3000K LEDs. Or maybe even 2x6500K and 2x2700K. And, of course, the ability to tint ramp between. It might need a lightly frosted optic though, to avoid yellow and blue artifacts in the corona area of the beam.
Sofirn did this on a quad, right? The quad was just… not that great otherwise, IIRC. Ah yes, the IF25 (random thread, first google result)
Just remove the top and the diffuser, install some optics, and find a bezel. Simple. 
I received two D4V2’s about a month ago, one aluminum and one titanium. Both of them blink out a firmware date of 2019 10 15. I can’t associate this date with any Anduril update on TK’s repository. Is it possible that the wrong firmware was flashed to these lights? Everything works as expected, but I was hoping to know if my lights captured the new thermal updates made late last year.
*edit: spelling
Wonder how hard it would be to adapt the LT1 driver/emitters into the Q8…
I’d LOVE to have an Emisar D3 equipped with variable tint!! :heart_eyes: :heart_eyes: :heart_eyes:
The code revision dates and firmware build dates don’t always line up exactly… especially if I’m developing code for a new light in a different branch. However, it should still be possible to get a pretty good idea which changes are included in a particular light, by looking at the code’s change log.
Anyway, a short summary of the D4v2 firmware changes as they relate to thermal regulation…
- 2019-05-22: Improved thermal regulation
- 2019-06-20: D4v2 released.
- 2019-07-18: Fixed D4v2’s muggle mode issue, same day it was discovered
- 2019-11-19: Kinda broke thermal regulation while merging in a major rewrite of some underlying code
- 2019-12-17: Mostly fixed thermal regulation, roughly how it was before
- 2019-03-16: Greatly improved thermal regulation with a major rewrite
So… if yours says 2019-10-15, it may not be the latest but it shouldn’t have any significant issues that I’m aware of. The worst is that it may occasionally miss a button click while it’s off… which was fixed on 2019-11-19.
In any case, there’s no harm in getting a flashing kit if you want to keep it updated. It’s not necessary, but it’ll let you get new features as they happen.
Good to know, thank you for clarifying, ToyKeeper, and appreciate the quick response. I should definitely have ordered the flashing kit with the lights, I’ll get one on my next order for sure. Just wish I could update my SP36 BLF as easily!
I would like to see a D3 from Hank. It could be a budget $30-35 model without aux lights.