KC1 keychain light is available now

Hank,

Great to hear about the improved throw from B35AM after tuning! Do you happen to have an updated release estimate for DM11? I’m waiting to place a big order until after it’s available.

Also, can you tell me what the maximum regulated current is for Noctigon K1 with SBT90.2? Is it 5A or 7.5A like some of your other Linear+FET drivers? I’m working on a review and would love to include this detail.

Thank you for all the great work you do!

Very nice, this is a really awesome development! Is there any chance you will still provide the option for the wide-angle optic for this or any other emitter? I know this is supposed to be a thrower, but that floody profile with the other optic was pretty nice in my opinion, it would be fun to try them both out

High CRI, rosy, reportedly efficient TIR thrower? Can’t wait

This is an awesome development! Thanks Hank! 48kcd is super impressive for this emitter :open_mouth:

Excellent, Hank! I’m really looking forward to the DM11!

B35AM with tuning looks great! Brb burying my wallet.

You are welcome.

Told ya…

I'm thinking of adding DC-Fix film if it's going to be needed but yes, flood optic might be a good idea to add as an option.

Hi Hank, are you able to get some of the Chinese-made flat emitters? I think the SFS80 is also a great option and I like it more than the SFT40.

I have the sfs80 in a Light and I'm not convinced it is as good as a sft40. Or that it's available in other CCT's either? No upside for sfs80 if considering both, IMO.

EDIT: ive also read here IIRC that SFS80 has a hard time going over 6amps, maybe? I heard there is a failure rate somewhere in that range. Or i could be thinking of the KD P35, though those could be the same LED too.. I don't know.

I’m even more excited for this with the optic tuning, though I think I’ll still get both optics if the wider one is offered. It’s good to have options.

So happy to see the B35AM is now functional in the throwy optic! Thank you!

Any chance you will release the DT8 with tint ramping with e21a LEDs?

I'm liking the results of the YINDING 5050 5000K round die so far: https://budgetlightforum.com/t/-/68542/43

De-lensed it's doing better in throw, and better in lumens. De-lens, it seems to be doing as good as a Boost HX (W2) but cheaper, and using a standard 5050 footprint.

So I checked the Nichia datasheet. B35AM is 0.73mm tall. The CREE XPP is 0.75mm, NM1 and PM1 measured 0.80mm, SFT40 was 1.10mm. The round 5050 yinding came in at 0.68mm. Haven’t measured the Cree HIs but datasheet says 1.0mm.

Is your SFS80 in a Nightwatch, Mateminco, or something else?

I have a Mateminco MT35 Mini-S with SFS80 that pulls 7.2A and does 115kcd from a 43mm head (a bit smaller than a C8) and 2100 lumens from my measurements. The beam is immaculate. It also has a lower color temperature and a slightly rosy tint.

On the other hand, I have four SFT40s in one light and three of them developed black spots. The total lumen output from all four is only 7600.

The E21A tint ramping version is up,
https://intl-outdoor.com/tint-ramping-instant-channel-swiching-led-flashlights.html

I have sfs80 in mt35 mini also. The beam is cool white, mine is not at all rosy, mostly very cool but somewhat "neutral", meaning not green. The beam also was horribly centered from the stock light, I had to recenter using a new centering ring which made it better but not perfect. I haven't measure throw yet but I'd be surprised if it was getting over 100kcd... it seems like another LED that is very sensitive to reflector height, like sft40. That stock Mateminco centering ring in mine is trash.

lumens seem higher than the sft40 though, just from a visual inspection- there is more spill to the sfs80 beam. That is a positive. I don't Ike the color anymore or less than the sft40. But that is all opinion of course. I have some sft40 that seem greener than others.

I don't doubt that 4 sft40 is only putting out 7600 lumens (1900lm each led) in a multi emitter setup, according to Djozz's testing that would mean that your light would need to be getting over 5.5amps to each of the emitters, over 22amps total. There are too many factors at play to effectively compare one led being better than another based on how one performs in a single emitter light vs the other in a multi emitter light. According to djozzs bench test the sft40 would be pulling 2300lm at 7.5a if in our mt35 mini's. But your 4x emitter light would need to be pulling 30amps+ for that to happen.. not a small feat.

Anyway, their performances are close at best. But the beam of the sft40 I have found to be better for throwing (tighter beam, more pronounced hotspot, generally speaking). But I do not have enough sample of sfs80 to completely verify that. I have 7 lights with sft40 and 1 light with sfs80.

Edit- the black spot occurrence - I've had it happen twice out of installing around a dozen sft40 in about 15 lights. I have seen others with it too. It is terribly disappointing. Someone I had given a sft40 to had black spots when they received it, which means I was the culprit. We both agreed it was more than likely soldernsplatter, something I was not terribly concerned about avoiding before working with the sft40. So, your right that the "ease of install" is diminished with the sft40..

I agree that they are similar which is still pretty impressive for the unknown Chinese manufacturer. The SFS80 is possibly more inconsistent than the SFT40 given some the anecdotal evidence on this site. Although both are not great.

It’s too bad that your SFS80 was poorly centered. Overall, I like the MT35 Mini-S more than I thought I would. I was pleasantly surprised on the lumen output because I thought it would be closer to an Osram W2.

The sfs80 is 263% the size of the w2 and 132% that of the sft40. I think some might be missing the point of how large this emitter is and that north of 3300 lumens would be needed to match the sft40 at max output and nearly 4200lm to match a w2 in intensity. Short of some voodoo magic - or a terribly nonhomogeneous brightness across the die surface - there is no way it competes in the throw realm with these emitters at max output. I could believe /expect that in the 3-5A range though it will put out more lemons than the sft by a meaningful margin.

How much current does the E21A tint ramping diver deliver? Is it 2.5A on each of the channels?