Luminus SFT40 test

My experience with cleaning sft40-

i have found that every time I reflow a sft40 (has happened over 2 dozen times now since last summer), that i pay special attention to the LES the first couple of times turning the light on. Especially after the first 1-2 times turning the light up to TOR, and I never turn it onto turbo right after installing it.

if or when the black spots appear on the LES after install, I remove the lense and reflector and I clean with qTip and isopropyl alcohol throroughly, and the black will be removed. And it almost never comes back.

i have found that you can scrub these leds very rigidly with a qTip, if it is needed, to remove the black spots, without negative effects to the led.

the only sft40 I have ruined with black spots on the LES are the ones I hadn't realized I neeDed to watch after installing, I didn't clean with alcohol after installing, and I ran high amps after installing without taking notice of any spots on the LES first.

I wonder if anyone knows a place to buy good (not green bins) of sft40?

the original release from Simon this past summer were fantastic. They were not green at all and very bright. I still have 3 or so lights with one of the original released sft40 in them.

all of the ones I have bought since from Simon (he is the only place I have bought them so far) have been varying amounts of green, at lower levels to about 3-4amps of current.

they "whiten" up after about 3-4amps of current, but still aren't as bright as the "less or no green" tint Bins that used to be available.

anyone find a seller who has had nicely tinted sft40 recently? Thank you.

Kaidomain has nice very cool SFT-40 6500K they are the whitest and brightest I’ve seen

Just looked again
convoy SFT-40 are N5 CE 5700k
Kaidomain SFT-40 are N5 BC 6500K and might be a better voltage bin looks like the same ones convoy originally had before the switch

BC seems to be between 6000K-6500K and above BBL, and CE 5700K-6000K and much higher above BBL.

awesome thank you so much!

There's a Convoy flashlight I want to get with this emitter, but I want a warmer tint.

Does anyone know if the Luminus SFT40 will ever come in warm white?

I don’t think we’ll ever ever see it in warm, but I’d be happy if they’d satisfy the 5000K need.

The (2020 prelim) datasheet shows chromacity for 4500K up to 10000K but the order code bins don’t list the 4500 at all, and actually the only ones that look to legit be released are 6500K (everything else says “contact Luminus” which basically means No unless you’re ordering huge amounts for a run). Covid ended the world so maybe something’s just further-delayed but I’d guess at this point that 6500 is all we get. I hope that their sales/product team doesn’t look at low sales as a reason not to introduce other colors/bins for this emitter, given that availability has been low and spotty from the start, but sometimes they do dumb things like that. “We’re discontinuing the following widgets because of low sales”…“but we couldn’t sell any because you didn’t provide us with stock to sell”…“sorry but the numbers govern our choices.” :slight_smile:

Is the 5000K SFT40 going to come out? I don’t know why they bother with 6500K and 5700K, most people prefer 5000K in comparison.

The 6500K actually isn’t that bad, on the warmer side of tint/temp than what you might expect. Most of the “cool white” emitters I’ve seen from several brands in 6500K are noticeably colder. With the SFT40 that Simon had last summer you can see the cold in the beam against the sky/with airborne debris/moisture but on targets it really isn’t half bad. I don’t know if his restocks after the first are the same but from reports it would seem so. Possible that it might even look better compared to a 5000K that is low CRI, but we’ll have to wait for that comparison until/if they ever release that version.

Hanks 6500k (intl-outdoor) is the nicest bin I have seen out of the 5-6 bins I have bought since last summer from various suppliers. It's doesn't "feel" like 6500k, and it has a really nice clean tint with almost zero green.

Does he sell the SFT40 separately? I couldn’t find a listing for them.

https://intl-outdoor.com/led.html

How suitable is the SFT40 to put in a BLF Q8? Could they take the FET drive? How would it compare to XHP50.2 emitters?

Probably, as long as he has them stocked for the flashlights he’s offering. Just ask him and he’ll give you a quote for that specific emitter. I bought some other unlisted LEDs from him without issues.

If your intent is to re-flow onto Sofitn’s Q8 Pro Q8. it is compatible and was done by Sofirn a while back as the 50.2 (3 volts) were not available. Mind you they were the SST40 which is basically the same but domed.
If you want to upgrade your existing BLF Q8, the footprint of the XPL-2 is 3535 and the SFT 40 is 5050. Some members got hold of a re-vamped MCPCB from Led4Power with such intent. Perhaps one would chime in…
As for beam quality, the SFTs are more throwy and have fewer artifacts less green than the XHPs. As for lumens, it depends on the electrical path as any minute resistance hinders the performance.

Yeah, I just bought a pair. Probably easiest if you have a regular order to add it to. Just email him first to get a quote on the emitters, place your regular order on the website, and then send an extra Paypal payment for the extra stuff with a message to add it to the existing order. That way he can process the order normally, and just toss the extra stuff in the box.

i ligted my sigaret with the sft 40 then the fosfor top layer burned and …. turns out its an blue led …. someone knows how many kelvin? … sorry for the crappy english im dutch…

You LIT YOUR CIGARETTE with the SFT40 LED?! You win the best-first-post-ever award, hands-down.

The underlying blue emitter does not have a well-defined CCT in Kelvins. As you see, the curve representing blackbody radiation converges to a point in the interior, not boundary, of the color space, so any color more blue than that limit point would not have a CCT.

I want to convert my Convoy C8 + to a diode SFT40 and a 10A driver. Is there such a driver 10A? Give me a link.

You’d be needing that to be FET driven and most likely needing to bypass both springs.