And not just the LED; the light itself too is a box of chocolate. Witness the battery over-charge of Nightwatch Avaritia. And yet some crazy beta-tester wannabes keep buying these things. 
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Nice find, thanks! That result didn’t pop up in my search attempts.
I wasn’t aware of superbuy(.com). For the price they list those LED’s, I certainly am more willing to order several of them for testing, than the 11-12 euro (each!) that Pioneman asks for them. Obviously there also will be extra costs via Superbuy, but I’m certainly going to look into it, to figure out if it might be worth giving it a try.
That 3V/20A rating (for what it’s worth), is already 5 amps higher than Pioneman lists it at. That 4900lm sounds (too) ambitious, but given that it has a smaller LES (at a 5050 footprint) than say, for example, the LHP531, it might still be an interesting LED for it’s intensity, even with a lower lm output.
Anyway, thanks for all the replies everyone!
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It is (now) also available in 3V on Taobao. (According to some Reddit posts I’ve found for over a year now, but I just found out yesterday.)
It is also listed on Superbuy: https://www.superbuy.com/en/page/buy/?url=https%3A%2F%2Fitem.taobao.com%2Fitem.htm%3Fid%3D833002797700&htag=pc.en.search.833002797700&nTag=pc.en.search.833002797700
Not the cheapest and most practical LED to use in a flashlight, but I would love to see (in a test) at what numbers it would max out!
Agreed. Not the cheapest, not the most practical either… but like a drag race sports car, definitely among the “funnest” LOL. I don’t have number from a test, but in my Nightwatch Super Valkyrie N103S output on this single LED is a fairly astounding 13,000 lm, heavily dependent on battery as expected. BTW the beam, unlike most of my other Nigthwatches, is throwy at lower output, and then throwy WITH the “wall of light” effect at Turbo.
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Not necessarily true. LatticePower and Lumenpioneer also provide datasheets. For HSXLED this is also sometimes the case.
Especially for custom-built LEDs datasheets are not included, they have to be ordered seperately by the customer.
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It wasn’t really clear by my post, but I was actually referencing to SFY55 64 die/chip LED, with a 16x16mm footprint, that elemental mentioned in his post. That could/should be a big step up from the SFP55, but it is also substantially more expensive than the SFP55.
It could also not be easy to find a host with a reflector that can house such a big LED.
I haven’t done the total cost calculation of a single SFY55, but at a quick glance on that Superbuy listing, it would at least cost around $ 20,-.
A picture of the SFY55 from the Superbuy listing. Quality/resolution of the photo wasn’t great, but it gives an idea:
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The fact that it is on a 32mm MCPCB shows you what a huge LED this is!
Does that photo means you already got one?
No, this is my good friend @LunaLoves’.
It’s so massive it severely limits host options.
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The 3v has been out for a while now. I actually modded it into a Convoy 3x21D at the time: https://www.reddit.com/r/flashlight/comments/1i41f0t/nmd_convoy_3x21d_sfy55_mkii_now_with_5500k/
I would say that in terms of lumen output with the Convoy 54A FET driver, it’s on par with my Convoy 3x21C with 7 x LHP531s. The LHP531 is a 9 core chip similar to the SFN43, so with 7 of those you get 63 cores which compare well with the 64 cores of the SFY55.
It could probably driven harder, but the Convoy FET driver can only push so hard, and the heat dissipation limits of the host are an issue too. It works well on the lower/medium settings for longer run-times, but for short giggle sessions, it is a fun light. If I ever rebuild it, I would defintely use the 25A buck/54A FET driver, but that didn’t exist at the time of this mod.
Due to the larger reflector of the 3x21D, it throws way farther than a 3x21C. It’s super impressive seeing that many lumens being thrown that far away, really. Tint is nice with the 5500k bin and the beam is nicely focused/clean in the 3x21D reflector.
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That would be my main reason for not buying one for now, although, reading that elemental was actually able to get it into a 3X21D, gives us already an example in which it could be fitted (with extra work pressumably) The pretty high price also keeps me from ordering one, ‘just to have it in stock’.
If I would have the proper equipment/test setup myself, like Koef has, I probably would be willing to order one, just to “play around with it”.
Thanks for replying here @elemental ! I’m certainly going to check (the link to) your build out!
That appears to make sense indeed. Going by the few (different) output numbers that I’ve seen floating around of the 3X21C with LHP531’s, the SFY55 should (easily) pass the 20000 lumen mark, up into the (high) 20’s.
I expect also that it could be driven harder and therefore a specific LED test would be very interesting, to see what its potential limits are and have a better understanding of what it can realisticly be driven to in a flashlight and what it would (technically) take to actually achieve those numbers.
That does sound like a suitable (and affordanble) host for a single high power LED. Did you have to make any modifications to the reflector hole, to get it to fit?
All in all: cool that you actually went so far as to actually build a flashlight with this LED!
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I believe the LHP 531 uses 43mil cores where the SFY55 uses 55mil cores so it should be brighter.
It could, if supplied with enough current and could dissipate enough heat, so the limitation here is more the driver and the host.
I think an SFY43 would work better even than an SFY55 for this sort of usage in real-world lights, as it would make it easier to fit in a reflector and still would soak up a bunch of current, as much as these FET drivers can put out.
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True, I believe the 3v SFY55 can handle 140A.
A friend is building a light with a 6v SFY55 and the plan is to hit it with around 70A.
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It would be an expensive project (given the host) and I don’t know enough details about it’s internals and how much room you would have to work with, but I wonder how well this LED would work in an Astrolux MF05 (V2); the thing has a huge mass (and ‘active cooling’) which might help with all the heat from the SFY55. The SFY55 will never be a super throwy LED, but with such a huge reflector, it would certainly help it in the right direction.
Would be a mighty LED in a mighty host!
But given the costs that would go with it, it’s not a project I would pick up… 
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Atleast give me credit 
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After running the idea over and over in my head, I couldn’t resist putting the Convoy 25A buck + 54A FET driver in my 3x21D SFY55 mod. I think it is a huge improvement now.
The 3x21D is still just good enough a host for this that with the buck on the lower modes the thermal situation has improved. Plus for quick blasts of FET turbo, the 2H interface is nice along-side the 2C buck turbo. Still outthrows my 3x21C by a wide margin. I wouldn’t accuse the SFY55 of being a throwy LED, but in the 3x21D host, it still matches my Firefly E90 for throw on turbo, so definitely not bad, it’s just that it has to push an absolutely stupid amount of current and brute lumens to get there. Enough to light up a football game.
The MF05 v2 could be a really interesting host as well. But it’s expensive, and the 46120 battery might not be able to supply anywhere as much current as 3x21700 setup with 3 Molicel P45Bs I am using now. But if someone had $600 to burn, it would certainly be a very interesting experiment.
I do get the feeling that the SFP55 is maybe the better idea for the 3x21D, because it can still take the 54A FET current, and it will be an easier fit with the MCPCB and reflector, and more throw, but a bit less lumens. It makes me wonder if the tint on the 5500k bin of the SFP55 is as good as the SFY55, which was unusually good for a Sanan LED.
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I don’t have an SFP55 yet but I do have some SFN43 5500K and the tint is pleasant.
I’m hoping/assuming the same phosphor mix is used for all variants but I could be way wrong.
Anyone know where I can get a SFY55 in 12 volt? Or maybe 24v etc?
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The only place I’m aware of that sells them in these voltages is on Taobao:
You could order them via Superbuy(.com) via this link:
https://www.superbuy.com/en/page/buy/?nTag=Home-search&from=search-input&url=https%3A%2F%2Fworld.taobao.com%2Flang%2Fen-us%2Fitem%2F733778240253.htm
I personally haven’t ordered via Superbuy yet (but am planning to do so), but @INeedMoreLumens has already some experience with them. (I first heard about them from INeedMoreLumens.)
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