Is there anyway to buy this W7070ST1 led ?
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I donât know of any distributors.
It looks a lot like the others floating around on AE, the L70 HI or similar leds. Could be they are made by the same firm, but packaged differently?
Exactly this is the case here. I made a direct side-by-side comparison by both LEDs.
Here in normal exposure (SFT-25R G1 BC highest bin code on the right):
Here with more contrast:
The vias patterns are definitely different between both chips. On the unknown LED, the vias are arranged much more densely, on the SFT-25R less densely. In terms of design, the LED chip of the unknown LED used in the Brinyte ZT40 is similar to that of a W5050SQ3, only with a much smaller diameter.
Also the LES is smaller on the SFT-25R, but not that much. Still a difference though. And the bonding wires of the real SFT-25R are thicker, too.
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Thank you very much for this comparison! Per your test, the W5050SQ3 has slightly lower Vf and attains a greater maximum power (although with lower output) than SFT25R, but has a high rate of failure. Hopefully this version actually attains more output and fixes the failure (probably a phosphor problem rather than a die problem). The thinner bond wires are surprising given the lower Vf.
Exciting news!
Per analysis by koef3 above, the new emitter uses a different die and larger footprint, so one should expect the performance to be different. But the official specs appear to be the same. I bet theyâre just too lazy to retest and update.
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Oh yeah!
I do hope its just them being lazy with the datasheet, cause Iâm also hoping it to have a better performance 
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Another new luminus release: SFT42, 5050 footprint.
This LED in 4000K 95 CRI will be the Holy Grail of LEDs.
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This is so exciting! I wonder if it uses the same die as the LMP W7070ST1.
I think Astrolux has used the latter in some lights, and reviews indicated a very green tint. Hopefully the SFT42 doesnât have any of that. This in 4000K 95CRI would be huge!
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I wonder if this actually is a Luminus LED. Kaidomain usually always puts the manufacturer in the LED name. There is not a single instance of âLuminusâ anywhere on this product page.
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The title is:
SFT-42R 42W 3V 11A 3230 LUMENS 6500K SMD 5050 LED
But the description is:
SFT-42R G1 BA White 7000K
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Huh thatâs an interesting discrepancy. At this high of a CCT, a difference of 500K would be only a tiny Euclidean distance on the CIE 1931 color chart, and sample variation or different drive current could easily make this difference.
The nomenclature and binning is consistent with that of Luminus. Perhaps it will appear on the Luminus site in a few weeks, like the 5050 SFT25R.
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Or it may disappear into the abyss like the SFT-40 4000K 
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Luminus: oh, i just made something incredibly nice, might as well never do it ever again.
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Sorry for making the mistake.
It is White 6500K.
I had modified it.
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Please donât worry. This is original Luminus LED.
For some reason, we canât put any manufacturer name before the LED.
We will keep only the model name.
Thanks.
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The datasheet of SFT-70X-WGH gen2, the High CRI SFT70, I think your post is a good place to share it.
Notably, the datasheet says it will have many CCT and high CRI variants, including the once short-lived 4000K high CRI. I got this PDF from a Chinese dealer, but they only have the 3000K variant at the moment, so I didnât try it.
If anyone wants, you can also share this on reddit or any other forum.
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This is seriously exciting news! It looks like 5700K 95CRI is also available. Iâm looking forward very much to this because cyans/blues are particularly important in high CCT emitters, and Luminus does it much better than Nichia. Just look at the spectrum: barely any cyan dip at all.
Hopefully it will be only a matter of time before they hit the market. The previous batches of SFT40 4000K, from what I heard, are inconsistent, with one batch having lower CRI and a greener tint. Hopefully we will see more consistency from this iteration.
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The datasheet of SFT-42R. Again, I think your post is in a good place to share it.
Notably, there is a watermark saying âunreleased documentâ, which is rarely seen in other Luminus preliminary product docs, so this may be a very early one, the data may not be guaranteed.
Update: I got the word, the die diameter in the datasheet is wrong, it should be 2.32mm instead of 2.22mm, so the final LES should be 4.2mm2, in line with the name.
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