Luminus SFT40 test

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fogofwar
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fogofwar wrote:
I can come back and report that my quad SFT40 light is still doing well. I cleaned it up with a Qtip and alcohol. The black spots became lighter in color but I wasn’t able to completely clean them off.

Since that time, I’ve ran the light a lot at even higher currents using 3*Samsung 30Qs instead of the 3*Tesla 18650s that I used before. There is no noticeable depreciation.

As stated above, I’m also inclined to believe the surface of the SFT40 is especially sticky for debris or flux splatter.

Actually, there is some damage to my emitter which had the darkest black spot. I switched my light to another mode group today to get moonlight and found that the right-most emitter has some blue leaking from the right side (see pics). The blue is also noticeable in the beam if you look close enough. I’m a bit disappointed since I don’t think any emitter has had more than 7A, though it’s one of my only lights which I can’t test the current on. It’s not a huge deal but it will hold me off from buying another SFT40 light. I’m probably going to wait on ordering a Jin Heng JKK90 until the SFT70 comes out.

Mike cz
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JaredM wrote:
Not to derail this fellas, but just stumbled across this..
https://m.aliexpress.com/item/1005003246180028.html

5050 3.14mm² assuming 2mm Ø “30W”

Its any news about this LED? I still waiting for my order. I must receive LEDs in few days. Maybe I will use 7pcs of this LED in my best headlamp. It will be crazy. Big Smile But maybe not better as OSRAM CxLPM1.TG.

Sidney Stratton
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Ohh Kayy… So you’re meaning to put some 200+ watts onto your head? Drawing some 40+ amps?

Maybe you meant car headlight:

I don’t believe there’s any provision to beef that up to a couple of hundred watts. Sorry I couldn’t find a 7 LED array.

As for throw, no beam shots or tests as yet been posted. I’m assuming you are referring to the CSLPMs or CULPMs.

Mike cz
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Big Smile Trust me Big Smile Its not joke. It is absolutely best headlamp/bikelight in the world. Amazing eletronic - 2x ARM CORTEX 48MHz 32bit, second DCDC for 3Volt logic,extreme output power, very lightweight, very extensive ribbing, lot of light mode - RGB, UV, lot of sensors - proxi, ambient, gyroscope, acceleromer, preparing Bluetooth... Wide input power supply (5)10 - 25Volt. Integrated fast charger/balancer/protections (not available now), GOPRO holder. 5 yaers developing..., before 2 yaers first light...

 These are a hundred meters high rocks with 7xXPH50.2. But there is no right time to present these lights in the world... Question

Light

This is 7xCSLPM1, Not bad. (it's a short shutter - dark sky)

Do you want to know the next detail about this light?

 

 

 

Sidney Stratton
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Whoa!

So I infer that you built this? Whittling away some 7 years, which just so corresponds to your inscription on BLF yet stayed silent. No proper presentation of your project, your progress, hurdles and achievements. Then, of what reason for such light other than showing off. If I wanted to illuminate a cliff wall, I’d design a handheld lantern, not a headbanded light.

And throwing in all sorts of features, short of the kitchen sink.

Sounds more of a dream chaser than actual prowess.

Fabulation…

EDIT: Others may be curious about your contraption, but as for me, respect comes with a progression of challenges. Many have done so in the various threads here, and kudos for all the hard work and persistence.

JaredM
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Mike cz wrote:
JaredM wrote:
Not to derail this fellas, but just stumbled across this..
https://m.aliexpress.com/item/1005003246180028.html

5050 3.14mm² assuming 2mm Ø “30W”

Its any news about this LED? I still waiting for my order. I must receive LEDs in few days. Maybe I will use 7pcs of this LED in my best headlamp. It will be crazy. Big Smile But maybe not better as OSRAM CxLPM1.TG.

Mine have been stuck in customs since 10-29

https://fundrazr.com/osturaband

No affiliation, just a fan.

funwok
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Mike cz wrote:

Do you want to know the next detail about this light?

Not really to be honest.

Sidney Stratton
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So after some googling, this fellow actually built a combo bike/head light.

Much ingenuity and work. I’ll let him explain if he’s still around.

So I’ll have to backtrack my skepticism…

Edit: Here’s a link to his site: http://solclighting.com/en/

ArtieT59
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Sidney Stratton wrote:
So after some googling, this fellow actually built a combo bike/head light. !https://imgur.com/f58z96d.jpg! Much ingenuity and work. I'll let him explain if he's still around. So I'll have to backtrack my skepticism...

 

Huh.. I'll be dammed. Pretty intense looking. I'd like to hear about it. 

[FLF] Five Light Friday https://budgetlightforum.com/node/78749

Check out some of my new lights (picture heavy) and quick first impressions of them here: https://budgetlightforum.com/node/77180

My Sft40 beamshots / comparison thread: https://budgetlightforum.com/node/78100

The BLF GT with SFT40 (2300lm, 2700m+ @ 30 seconds!)
https://budgetlightforum.com/node/79561

polarweis
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Does anyone know a good cheap source for this led? Seems hard to find right now.

"It wouldn’t be so bright if there wasn’t a shadow every once in a while." - Jason Mraz

Correllux
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polarweis wrote:
Does anyone know a good cheap source for this led? Seems hard to find right now.

Seems like Kaidomain had some available recently but other than that everyone is still waiting. Best bet might be to buy a less expensive light that has it and remove it from that.

furandchalk
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Quote:
Then, of what reason for such light other than showing off. If I wanted to illuminate a cliff wall, I’d design a handheld lantern, not a headbanded light.

Off topic, but I’m always surprised to see comments like this about products or ideas aimed at different user groups, especially when it comes to headlamps. In this case, you would probably choose a powerful headbanded light over the handheld lantern if you intended to climb the 5 pitch wall. This isn’t the one I would choose personally, but there’re certainly use cases for headlamps with more throw, output and/or capacity than a typical headlamp.

A while back someone suggested there’s no use for 21700 right angle headlamps, that 21700’s are just too heavy. Meanwhile, I’m looking at a climbing/caving helmet decked out with dual mounted H600s + side-mounted sc700d. Sometimes I wish there were a dedicated sub-forum for SAR & outdoor sports. I guess there wouldn’t be enough activity to justify it, but mods and reviews for niche lights like that would be pretty cool.

Sidney Stratton
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@furandchalk:

You are taking that comment out of context. Here there is this fellow, out of the blue, claiming wild specs of his headlight.

Mike cz wrote:
Big Smile Trust me Big Smile Its not joke. It is absolutely best headlamp/bikelight in the world. Amazing eletronic – 2x ARM CORTEX 48MHz 32bit, second DCDC for 3Volt logic,extreme output power, very lightweight, very extensive ribbing, lot of light mode – RGB, UV, lot of sensors – proxi, ambient, gyroscope, acceleromer, preparing Bluetooth… Wide input power supply (5)10 – 25Volt. Integrated fast charger/balancer/protections (not available now), GOPRO holder. 5 yaers developing…, before 2 yaers first light… These are a hundred meters high rocks with 7xXPH50.2. But there is no right time to present these lights in the world… Question

And posts a so often replicated picture (and often PhotoShopped) of some flashlight shining brightly some natural backdrop. Then the fact he has 2 posts over 7 years a member. This all seemed very constructed as some hype. So naturally, I questioned his authenticity and motive in making the “best headlight in the world”.

Now if you have experience in climbing and would see such headlight as a positive accessory, you are most welcome in debating such. But within the context, and presumably a sham, my opinion is not demotivational, biased or derogatory towards any group of users.

I would like to conclude the fellow did make such a light. His way of presenting his construction is somewhat unorthodox. I had PMed him to give further specs and links to his site, but this has fallen on deaf ears.

dave1010
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Both the Astrolux FT02S and EA01S have a 4 * SST40 LED option for around 7000 lumens from a single 21700. I’ve only done a couple of basic mods but am considering a 4 * SFT40.

The FT02S with SST40 is about 100kcd.

Couple of questions:

  • Is the SST40 to SFT40 a straight swap?
  • What kind of output could I expect?

Thanks

fogofwar
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Yep a simple reflow will do it. Any SST40 driver will work with SFT40. Lumens should be similar, candela will go up by 50% or so.

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Thanks fogofwar.

Around 150kcd (775m throw) would be good but I was hoping for a bit more.

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It must be more. An oldschool dedome of a Cree led decreases output 10-15% and increases throw up to 100%. Without loosing lumens going from SST40 to SFT40, throw increase could be even more than 100%, so over 200kcd in your case.

fogofwar
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Yeah, I think it’s more now that I reconsider. I have a SST40 in a C8 body with about 85kcd and the SFT40 should be about 150kcd. I don’t have a SFT40 in a C8 body but something a bit smaller which gives 115kcd (Sofirn IF22A). Therefore my new prediction is 75% more candela.

The Luminus domes are not necessarily the same as Cree domes (maybe different index of refraction), so I don’t think the Cree results are directly applicable. The domed Luminus emitters such as the SST20 and SST40 already throw pretty well.

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The Sofirn IF22A has too much resistance in the tail spring which results in 1580 lumens. The Convoy C8+ with ramping 8A driver it gets 2000 lumens at 30 seconds

- IF22A – 685m
- C8+ SFT40 – 819m
- C8+ SST40 – 690m

Piercing The Darkness YouTube channel – https://www.youtube.com/c/PiercingTheDarkness

fogofwar
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Then you only got 40% more candela with the SFT40 (819/690)^2-1

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I guess when the Convoy hosts are never fine tuned it’s never going to give optimal results. The SFT40 has too large of a corona, so it would require tweaking, but works well as is for hunting. My CULPM1 gets 977m so the SFT40 is a good balance

Piercing The Darkness YouTube channel – https://www.youtube.com/c/PiercingTheDarkness

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Domeless leds require the reflector a bit deeper, so going from SST40 to SFT40, a thing to do is sand the centerpiece thinner to get the focus correct again (assuming the stock light has perfect focus).

TIFisher
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Is anyone here running a 40T (or 30T for that matter) in their Sofirn IF22A? I’ve been sticking with the stock Sofirn/Lishen 5000 mAh (~9.6A) for fear of over driving the SFT-40, but based on Funtastic’s observations about the tailspring/lux numbers I’m tempted to ‘pump up the jam’, so to speak.
Tempting fate, or not to worry?

Deluminator
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Looks like Simon has 5700k sft40 N5-CE-VJ. Anyone try them yet?

Looking to buy used Reylight Pineapple & Acebeam M10? PM ME

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No, but you convinced me to order some Wink

merlot
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djozz wrote:
Domeless leds require the reflector a bit deeper, so going from SST40 to SFT40, a thing to do is sand the centerpiece thinner to get the focus correct again (assuming the stock light has perfect focus).

If you dont mind could you elaborate on this please? I’ve recently put a domeless emitter in a convoy s21a and it has a dark spot in the middle of the beam, I think from not being focussed. properly. When you say “sand the centrepiece thinner”, do you mean the bottom of the reflector? So the same thing as making the centering ring thinner? Is the aim to make the LED sit a bit further in to the reflector? Thanks in advance

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merlot wrote:
djozz wrote:
Domeless leds require the reflector a bit deeper, so going from SST40 to SFT40, a thing to do is sand the centerpiece thinner to get the focus correct again (assuming the stock light has perfect focus).

If you dont mind could you elaborate on this please? I’ve recently put a domeless emitter in a convoy s21a and it has a dark spot in the middle of the beam, I think from not being focussed. properly. When you say “sand the centrepiece thinner”, do you mean the bottom of the reflector? So the same thing as making the centering ring thinner? Is the aim to make the LED sit a bit further in to the reflector? Thanks in advance

A dark spot in the middle of the beam does not necessarily mean it is not focussed properly. At what distance from the white wall (I’m guessing) were you standing when you observed this “donut”? It may very well disappear after you move away from the wall. Try that angle before you attack the backside of the reflector.

You are a flashaholic if you are forced to come out of the closet, to make room for more flashlights.

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Yokiamy wrote:
No, but you convinced me to order some Wink

Same, just ordered one as I missed out last time when they sold out quick.

djozz
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After dedoming the led I used to sand the base of the plastic centerpiece-thingy paper-thin so that the reflector sits almost directly on the MCPCB. That was the right correction for the focus.

Deluminator
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If ya’ll would be able to test color index, that would be awesome.

I still have 5 of the old batch. With this not being a cheap led. I would love to know before i buy again.

Wink wink “DJOZZ

Looking to buy used Reylight Pineapple & Acebeam M10? PM ME

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