At least one good thing… If they manage to apply this for all their other LEDs in new revisions/batches…
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I checked the datasheets. The relative chromaticity (“tint shift”) of the SFT-90 depending on operating current seems to be more or less the same as for the XHP70.3. The SFT-40 for example has way more tint shift.
From my first impression the tint shift of the SFT-90 is indeed way less extreme as for all other Luminus/Sanan emitters I tested.
The cool white SBT-90.2 (gen 2) and SFT-40 gen 2 still have the enormous tint shift, according to their official datasheets.
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I’m guessing the SFT90 isn’t as bright as the SBT90.2
(I can live with that.)
How well does the SFT90 handle heat and extended runtimes (compared to the SBT90.2) ? 
Don’t know, don’t have my sample of SBT90.2 yet
But since I don’t test LEDs in flashlights we better wait for flashlights equipped with SFT-90 right from the factory.
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Even if, it’s nice to have more (and cheaper) options in the high amp 3V category.
Especially if they bringt this out in 5000K.
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Yep, and I’m more concerned about heat and extended runtimes.
The SBT90.2 is notorious for producing a huge amount of heat, and it doesn’t have very good extended runtimes either.
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The SBT-90.2 is slightly better in performance, but not as much as you might expect.
Unfortunately my SBT-90.2 sample has some reflections from the metal frame and the glass, which gives lower luminance numbers due to bigger light emitting surface area…
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Keep us updated, I just tossed my SFT-90 in my L21B with a 6V8A driver because I’m impatient waiting for a FET driver, and it worked! Single mode, unsurprisingly. I measured 18.8A, 4000 out-the-front lumens on the TKLamp. That’s with a P45B. Quite ringy, at least with the KR1 centering ring I used.
This is sheer insanity, I love it
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With FET driver, reading about 22A at the tailcap and 4100lm. Looks like that last 3 amps is mostly heat
It seems to offer a fair bit less lumen output than an xhp70.3. The LES doesn’t look that much smaller at first glances. What makes this a more compelling emitter than any of current offerings? Running 20A from a FET driver to get same/less lumens than the an xhp70.3hi on 6v8a. Also while being in a less attractive cct and tint. Is it handling and dispersing heat better? Just trying to think of best use case for this emitter.
In my opinion the SFT-90 only makes sense if the emitter has to be (relatively) cheap and the footprint has to be 7070.
SBT-90.2 is slightly better in terms of performance, but also far more expensive. For me, the SFT-90 is simply a sidegrade and not an upgrade.
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Seems like it would be a good alternative for lights that would use multi-SBT90 otherwise, in that case.
Something with deep triple/quad reflectors and SFT-90 would be very nice in that case, without having $100 on the emitters.
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I agree. It’s a good 3V LED candidate for high powered arrays. I am glad to see SFT-25R and SFT-90 available now.
Yeah, the SFT25R, SFT40, and SFT90 is a very nice throw-oriented series in 3V. They cover all the common footprints (3535, 5050, 7070), with increasing LES (2.25, 4, 9), increasing output, and backwards-increasing intensity. Only thing missing is high CRI variants of 25R and 90. And 4000K high CRI…
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Nice try. 
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