The Malkoff Front Porch

[Kestrel]

I'm thinking it comes down to builder preference on what he's looking for in overall beam.

Myself, the beam from the M91 made me lose all interest in the M61 beam profile; but I'm thinking it's all about product differentiation - is the SST a smaller die so throws better than the Nichia ?

Also, the M61 reflector was initially designed for the Cree XP-G, and I'm sure Gene was happy with the result;
Does the SST do a good job of duplicating that beam profile ?

Just thinking out loud,

 

[DE73]

Also, the M61 reflector was initially designed for the Cree XP-G

So SST20 fits in the old XP-G reflector, that can be the reason why they don't provide newer leds. Probably big investment for new reflector if they should start to use 519a.

 

[Rossymeister]

Is kosen planning on releasing any more 1xAA (1-2v) lights here soon?

 

[Rossymeister]

I'm thinking it comes down to builder preference on what he's looking for in overall beam.

Myself, the beam from the M91 made me lose all interest in the M61 beam profile; but I'm thinking it's all about product differentiation - is the SST a smaller die so throws better than the Nichia ?

Also, the M61 reflector was initially designed for the Cree XP-G, and I'm sure Gene was happy with the result;
Does the SST do a good job of duplicating that beam profile ?

Just thinking out loud,

I love the M91B in a Surefire C3. Super bright, with a simple on and off.

I guess im partial to the cree xp-l.

 

[Schokokeks]

I also think Gene uses the SST-20 due to supply chain verification.

A few other makers in the U.S. have mentioned to me (or others) they it can be hard to source Nichia emitters directly, so they often end up buying them from Chinese intermediaries (a la Kaidomain), whereas Samsung and Luminous seems to be easier to get directly, from a more verified source.


I think, too, Gene is less interested in lights for tint snobs and whatever the new hotness is (Kosen handles that), and he just wants a good, reliably sourced, high CRI emitter, and the SST-20 does a great job of it.


I know I'm in the minority, but I kind of find the 4000K SST-20 to be my favorite single emitter. My MDC AA looks amazing.
White wall hunting, the green tints are visible, but whenever I am using them (especially outside), they simply look better than the 519A. I love that slight yellow to the tint.

Also, as mentioned, the reflector seems to work really well with them, so you get a bit better throw, and a smaller hotspot.

Finally, I wouldn't be surprised if Gene simply bought a massive amount of SST-20's. And, frankly, they're not so bad you shouldn't use them.

 

[jonc2]

Looks like the Prometheus 1-AAA Beta QRV3 is back in stock on the Malkoff website.

Prometheus 1-AAA BETA QRV3 – Malkoff Devices

This is a special edition BETA QRV3 manufactured by Prometheus Lights especially for Malkoff Devices. The body is constructed of 6061 T6 Aluminum with a Hard Anodized Black Matte Finish. The body features a unique circular spring quick release key chain ring. A titanium pocket clip with brass...

malkoffdevices.com

Has anyone purchased this light & reviewed it? I'm interested in what the beam looks like.

 

[NutSAK]

I've been playing around with 2 AA (energizer lithium) cells in an MD3 and M91B dropin. Nice amount of light at 0.65 amps. Likely get 4 hours of runtime. Does anyone have experience with an adapter to tighten up the batteries in the MD3 tube, either commercially available or DIY?

I've recently made inexpensive DIY versions of the Oveready 18mm 2xAA adapters that are just as effective, except without the partial cover over one end of the tube. I actually prefer these to the Oveready sleeves because they will accommodate slightly thicker cells such as 14500 Li-Ion, not to mention they're a helluva lot cheaper.

Cut these to length (100-110mm): https://www.amazon.com/dp/B0FC1G8M19?ref=ppx_yo2ov_dt_b_fed_asin_title

Cap them off with these for use as a cell carrier: https://www.amazon.com/dp/B0F6ML1XPG?ref=ppx_yo2ov_dt_b_fed_asin_title

 

[RWT1405]

I've recently made inexpensive DIY versions of the Oveready 18mm 2xAA adapters that are just as effective, except without the partial cover over the positive end of the tube. I actually prefer these to the Oveready sleeves because they will accommodate slightly thicker cells such as 14500 Li-Ion, not to mention they're a helluva lot cheaper.

Cut these to length (100-110mm): https://www.amazon.com/dp/B0FC1G8M19?ref=ppx_yo2ov_dt_b_fed_asin_title

Cap them off with these to use as a cell carrier: https://www.amazon.com/dp/B0F6ML1XPG?ref=ppx_yo2ov_dt_b_fed_asin_title

That's GREAT information!

Thank you for sharing!

 

[md17]

Decided to break out the old 6p and let it run the Kosen m361 hcri 519a drop in. Only issue encountered is that the mode would change if the light was bumped while using it. There's a McClicky in the tail cap. The solution was 2 battery bumpers on the switch side and 1 on the top side. This thing is bomb proof. No rattle at all. Added a copper bezel ring and a GITD o ring to the top of the drop in.

 

[JJZ109]

This just in. Kōsen Malkoff M361 HCRI Light Engine with Nichia 519A sm353 domed LED available now with only a few left.

 

[DE73]

This just in. Kōsen Malkoff M361 HCRI Light Engine with Nichia 519A sm353 domed LED available now with only a few left.

Thanks for the heads up. Didn’t know this module existed. Ordered one.

 

[DE73]

Decided to break out the old 6p and let it run the Kosen m361 hcri 519a drop in. Only issue encountered is that the mode would change if the light was bumped while using it. There's a McClicky in the tail cap. The solution was 2 battery bumpers on the switch side and 1 on the top side. This thing is bomb proof. No rattle at all. Added a copper bezel ring and a GITD o ring to the top of the drop in.

View attachment 84552

View attachment 84553

Just ordered the same module. How's the beam compared to the standard (SST-20) M361 Neutral that I already have?

 

[DE73]

This just in. Kōsen Malkoff M361 HCRI Light Engine with Nichia 519A sm353 domed LED available now with only a few left.

Just received it and are a little bit disappointed. According to the website it should be 3500K but the delivered are marked 4500K. 4500K seems correct when I try it.

M361 HCRI Light Engine (3-mode LMH)

Short Specs (full specs below): - Emitter: Nichia 519A sm353 domed LED - Optic style: McR-series textured reflector - CCT: 3500K - Power source:...

www.kosen.one

 

[DE73]

Decided to break out the old 6p and let it run the Kosen m361 hcri 519a drop in. Only issue encountered is that the mode would change if the light was bumped while using it. There's a McClicky in the tail cap. The solution was 2 battery bumpers on the switch side and 1 on the top side. This thing is bomb proof. No rattle at all. Added a copper bezel ring and a GITD o ring to the top of the drop in.

View attachment 84552

View attachment 84553

Is your 3500K or 4500K?

 

[JJZ109]

Just received it and are a little bit disappointed. According to the website it should be 3500K but the delivered are marked 4500K. 4500K seems correct when I try it.

Although they are marked 4500K, I received this reply from Stephen when I asked:

“The M361 were never made in 4500K and were all mis-labeled. There was a miscommunication between our LED supplier and the production team. We've changed some processes to minimize such errors in the future.”

“All of the M361 we have made are using the Nichia 519A sm353 LED which is 3500K, so yours is also 3500K.”

I have yet to test mine, but based on this information yours should indeed be 3500K. I own a 4500K M361, so at some point I will compare them.

I hope this helps…

 

[DE73]

I'm quite sure its around 4500K. It's definitely not 3500K, its way more neutral. I have compared it to other Malkoffs and Lumens Factory that's 4000K and this one are more white/neutral.
The packaging is just a small zip bag marked with pen so why didn't they just fix new ones if they were wrong.

 

[JJZ109]

I’ll try to compare mine tonight.

 

[DE73]

I'll try to compare mine tonight.

Thanks!
Just saw that the module are engraved with 4500K so it's not only the plastic bag. I was expecting it to much more warm and that's what I wanted. I have many neutral and wanted some warm around 3500K. I have one Malkoff 3000K and one 4000K and wanted one in between not a more white/neutral.

 

[JJZ109]

I'm quite sure its around 4500K. It's definitely not 3500K, its way more neutral. I have compared it to other Malkoffs and Lumens Factory that's 4000K and this one are more white/neutral.

After work, I compared my new M361 3500K light engine with the M361 4500K light engine that was included with my Kosen VME Titanium flashlight; they both appear to be the same CCT. Then I compared the M361 "3500K" with my EagTac D25A MKII Nichia 519A 4500K; both appear to be the same CCT, Finally , I compared the M361 "3500K" (185 lumens setting) with my Malkoff MDC 1CR123 Luminus SST-20 4000K (210 lumens setting) and the SST-20 4000K CCT is warmer. I'm not unhappy with the result as I want the spare M361 4500K. I can't explain the Kosen response to my inquiry. As of today, this light engine shows SOLD OUT status on the website, and I would absolutely love to have a third, but 💸. You could reach out to Stephen if you aren't happy with it though.

 

[DE73]

After work, I compared my new M361 3500K light engine with the M361 4500K light engine that was included with my Kosen VME Titanium flashlight; they both appear to be the same CCT. Then I compared the M361 "3500K" with my EagTac D25A MKII Nichia 519A 4500K; both appear to be the same CCT, Finally , I compared the M361 "3500K" (185 lumens setting) with my Malkoff MDC 1CR123 Luminus SST-20 4000K (210 lumens setting) and the SST-20 4000K CCT is warmer. I'm not unhappy with the result as I want the spare M361 4500K. I can't explain the Kosen response to my inquiry. As of today, this light engine shows SOLD OUT status on the website, and I would absolutely love to have a third, but 💸. You could reach out to Stephen if you aren't happy with it though.

Thank you very much for testing. Please contact Stephen/ Kōsen about your testing and conclusion. It’s not complaining it’s helping them for future improvements. A small business with special runs must really know what they are selling. You order from them because you want that specific LED not random specification. Quite big difference between 3500K and 4500K. It’s a nice module but not what I ordered and wanted.