I’m looking forward to seeing data on these start trickling in. Do we know what voltage the SFN60 runs at, and whether or not it has a dome? If it’s a flat 6-12V emitter I could see it catching on in single-LED throwers as an option that’s (potentially) cheaper than an SBT90.2 but more intense than an XHP70.2, which I’d imagine lots of people (including myself) would buy.
Maybe someone with contacts to Mateminco (Freeme?) could ask for datasheets. I know Lexel once used to be in close contact with Mateminco but he has been offline for 9 months now. I try to ask helicoil (Martin) on TLF for he is very active on the Chinese flashlight forum Baidu and frequently posts news about these new emitters. Sofirn said these LEDs were maybe customized for certain manufacturers. That could leave room to hope for warmer tints (4000K - 5700K) if specifically requested. Usually, these LEDs come in 6500-7000K coldwhite tint. If I am not mistaken Simon Mao is in close contact to Getian who are willing to offer any desired CCT on request, e.g. for the FC40 LED.
Getian is hesitant about different voltage configurations though over cost concerns with complex bond wire layouts.
I’m particularly interested in 5050 footprint emitters in 3V and 4500-5500K ~80CRI (Rg > 98 , R9 > 5 , Duv < 0) for high output. A Getian competing HiCRI variant would be nice as well.
I would really love to see a 6V version of the FC40 as an upgrade path for MTG-02 lights.
As far as I have seen, those new China-LEDs are two steps back in terms of efficiency.
Sub 100Lm/W in times where even High Power LEDs are usually over 150Lm/W is not the right way
In this page shows the Nightwatch NSX3E "Extreme edition":
The description (in Chinese), translated, gives these info
NS33FE: 3x SFS80 6500k LED, max 24A current, 6200 lumens, 60kcd (490m)
NS34Mini: 4x SFS80 6500k LED , max 24A current, 6800 lumens, 70kcd (529m)
NS63FE: 3x SFQ60 5500k LED, max 33A current, 10000 lumens, 48kcd (438m)
(comment: SFQ60 LED appears to be in ~5500k color temperature)
How do you know that? Have you tested it? I understand why the SFN55.2 might not be efficient with it’s very low vf. Combine that with a linear driver and yh it’s not gonna be great. At turbo it seems pretty similar to 7x osram 2mm. Pulls about the same current with similar output.
10k Lumens from a single Cell light that draws 33A = ~120 Watts which means ~83 Lumens per Watt
That’s at close to max output. I don’t think a dedomed XHP70.2 will be much different.
I tested the SFN55.2 in a NI03 and got near makes no difference 29 amps at probably 3.3-3.5 volts (6912 conservative Lumens) with the included 26800 battery. I’m thinking of trying a 30T to see if I can get more since I know that 26800 is really working hard at that drive current. Until someone officially tests one in a sphere to prove it, I’ll put my money on the table that the SFN55.2 will be as bright (or brighter) than a 70.2 with less power consumption. Take off the dome and it will be even less output.
Nice legwork Dave! I am excited to see more of these high power Chinese emitters in flashlights. Hopefully we can get some data sheets soon.
There’s a new custom red led on kaidomain as well. I’m trying to get Simon to fit it into the Convoy H1
I would also be reticent regarding LED lifespan… until this is verified by a trusted 3rd party.
For some reason, the luminous area values in that chart seem to be way off for at least some of the emitters.
SFT70 = 6.25 mm²
XHP35HI = 5.8 mm²
SFS80 = 5.2 mm²
Interestingly, the lm/mm² values seem mostly in line with values in my tables. Two wrongs make a right?
Thanks! This is great.
From the image, these ones are discontinued or will be soon:
- SFS80
- SFQ60
- SFN60
- SFQ75
The chart also has some 11mm * 11mm LEDs, like the SBT90.2 but more floody:
- SFH55 14200 lm!
- SFH43P 8900 lm
- SFH40 8000 lm
We need to find a cell that can handle 62A for the SFH55
3x21700 should do it!
Probably should just use a car battery
LOL.
Im really torn on buying this new FT03 (mateminco version) with the SFN55.2
Can anyone who has a light with one of these LED's share any information? is it interesting / WOWing / fun? I have all three LED variations of the FT03 (one with SFT40 not sst40), any reason i should even be considering the SFN55.2 version?
If so, better to run a Molicel P42a or one of the QB26800 batteries i have laying around? I would need to buy another battery tube though, thats another $10.. thats $60 for an FT03 that does (7000?) lumens. Is that compelling? I don't know.
Well, if the NI03 is any indication of performance to the ft03, I say get it. You won’t be sorry. I don’t think the heat sinking is as good though on the ft03 so your duty cycle on higher modes will be lower. Use the 26800. I really like that cell and it’s probably diminishing returns to use a P42A.