Thanks. Cool to see that they are available from another source. I see that mouser is also offering the the cooler lower CRI SST-20s, too in MOQ1, but non-stocked.
They also list SST-40s now, and in 5000K and 5700K CCT, which I haven’t seen anywhere before. Unfortunately they are MOQ 500.
Thank you for mentioning that. I specifically wanted to get a few of 3500K CCT ones :partying_face:
I agree tried both 3000k and 4000k. 3500 should be a perfect compromise.
3500K should be a sweet spot, I put 2*4000K and 2*3000K in my D4 it’s puuurfect !
I hope someone bites the bullet and tests these cause in my opinion the 4000K from Kaidomain is just a bit too green, even more so than LH351D which doesn’t bother me too much.
I have the same emitter from that review. I like the other properties of the LED I just mean I want to see what tint this specific reel is from Mouser since I think the Kaidomain one is more green than I prefer.
The Mouser emitters could come from the same bin as the Kaidomain emitters. I don’t think there is any way to know until they’re received. I’m pretty sure Mouser just takes the reels as received, and trims off the ordered quantity without even looking at the bins.
The kits come in 4 bin and 16 bin sizes. The links I dug up are a 4 bin kit.
Here’s the chart Maukka posted in his review from the datasheet. Kaidomain’s current stock are FB4, so it makes sense that they’re a little bit green:
It could be, yes. But at least it’s a different flux bin so you know it wont be the exact same thing either way. A chance i’m sure someone is willing to take 
So, with the 4000k one, we have 1/2 chance of getting a below BBL LED, and a 1/2 chance of getting an above BBL LED.
Just use them in a quad
Hmm.
Perhaps we should organize a GB for these LEDs.
I’d be up for about 25pcs for 4000k, and 10pcs for 3500k.
The price would be halved for 250pcs of LEDs, so that would be nice to organize.
If anyone starts such a group buy, I will go for at least 25× 3500K
Even the FA3 tint bin that Fireflies is using is reported to be a little on the green side and requires a minus green filter to perfect. If we can source the FA1, FA4, FD1, FD4, I will be willing to buy at least 25.
I can organize a group buy if enough people are interested in the 3500k 95CRI LEDs. Goal would be 250. Just let me know if y’all think it is doable. They are estimated to ship in January.
We may have to go with this new Luminus LED for the BLF Lantern project, as apparently the Samsung 351 series in 2700K & 5000K are hard to order for the manufacturer of the lantern, but have not seen or tested this SST-20 emitter yet.
Personally I think it would be a good option. Going with CRI above 9080 really gets quickly into diminishing returns in terms of light quality. Going above 9050 quickly reduces efficacy. SST-20 is already quite inefficient, but I don’t think it’s too inefficient for this lantern…and for a CRI 95 emitter it’s good. It’s quite a bit smaller than LH351D which negatively affects its performance at high currents, but this lantern won’t have high currents. It’s already quite rosy and tint mixing will make it even rosier, we can expect CRI to suffer because of that. But is that going to make the light more or less pleasant?
As this emitter is only available in the 2700-4000K CCT range, this should be less of a problem. Mixing tint with a 2700K and 4000K emitter should give desirable result (maybe a bit on the rosy side between 3000K and 3500K).
I think, Nichia E21A could be still considered for the lantern (but it would need different PCB), as it has CCTs down to 2200K and 2000K with R9080 CRI (these are designated as R9050, but maukka measured R9 above 95 for the 2000K variant). Nichia E21A could be a good candidate for tri-channel mixing (e.g. 2000K, 3000K, 4500K), but I know, that it is only a wish of mine
I fear that the E21A would give handling problems when reflowed by flashlight manufacturers, it is a delicate operation and I’m pretty sure they have no pick-n-place machines at Sofirn.
I’m all for the SST-20-W led, at these drive currents it is not that much less efficient than the LH351D. I think though that a few people regret that the colour temperature will not go up to 5000K anymore. Btw, I had understood from Barry (from a different discussion) that Sofirn is able to source the high CRI SST-20 leds.
Yes, the bare phosphor of the E21A seems to be pretty sensitive, so I would not try it myself as well.
Good news I had a talk with Sofirn a few months earlier about how high CRI can be good.
So I hope, if they can source those LEDs, they will