KC1 keychain light is available now

3000k too would be nice. But thanks for the great selection especially with 2000k included! That is the perfect bedside or star gazing cct.

If what he listed are the actual CCTs of the emitters I imagine mixing tints will be an option like it has been on other Emisar lights. That would make for many options in final temp (and with better tint too).

I’d love to see a single-emitter version of this with a reflector or a throwy TIR. I might even need two of those.

TIR can never be throwy enough in my opnion, if I want a thrower, it will always be a relfector based flashlight.

So, is there a K1 coming?

And, any timeline on the D1S?

https://intl-outdoor.com/led-flashlights/k1-21700-thrower-led-flashlight.html K1 here

They mean a “KR1”, a single-emitter KR4.

Not a thrower.

Ever since the original D4 came out, people have been asking for a specific type of light which Intl-Outdoor has not yet made — a single-emitter EDC-style light. Basically, a Noctigon version of something like a ZebraLight SC64 or an Olight S2.

The D4 makes about 4 or 5 cd/lm, while the D1 makes about 33 cd/lm. Between the two is a hole in the product line.

The goal would be to fill that hole with something as small as possible with 18650 and one LED — narrower and lighter than a D4, with thinner walls. The beam pattern would be about 10 or 12 cd/lm. Ideally, with a deep carry clip which is straight and runs parallel to the body. The body is probably about 21 mm in diameter, the head is as narrow (or almost as narrow) as the body, and the light is ideally under 100 mm in length if possible.

Something like this would work well with a regulated 5A driver. For the LED, it might make sense to use XP-L HI, XP-L HD, LH351D, or 4xE21A / 4xE17A arranged together so the LEDs touch each other.

The choice of optic or reflector probably depends on which LED is used and how throwy it is. For example, XP-L HI might work with a frosted TIR or a heavy orange-peel reflector, while LH351D might work better with a clear TIR or a light orange-peel reflector. It would require some experimentation to produce a nice-looking beam with the right amount of candelas per lumen.

I hope this description clarifies the idea.

http://kaidomain.com/Flashlight-DIY-and-Tools/led-pcbs-or-mcpcbs/20mm-x-1_5mm-Quad-DTP-Copper-PCB-for-4-x-Cree-XP-series-or-3535-LEDs-2pcs?limit=100

More like this for e21a:

:beer: :+1:

This is essentially XHP70, XHP50, XHP35 under one single footprint which one can actually solder properly not having headaches with alignment in mass production of 4 different footprints. This is exactly why XHP50 in 3V is used for without wasting so much space with a wide base, time and effort.
And the beam pattern is not better than what those XHP type of LEDs have to offer.

Please for XHP35 Hi 4500K CRI80+ :heart_eyes: :heart_eyes: :heart_eyes:

This would be a great KR1 option!

I just want to second what ToyKeeper replied to this. What she and I are talking about is not a thrower, but an EDC light that’s more throwy than a D4. It may or may not have more maximum turn-on throw (it probably would using an SST-20), but able to do a given amount of throw (e.g. 5000 candela) with less heat and battery use. My first choice of optic would probably be a textured reflector, which loses a tiny bit of throw for a smoother beam.

The Lumintop FW1A is similar to what we’re describing, but I think Noctigon could do a better job. A slimmer host would be ideal, but the same host with a slightly longer head to accommodate the single optic would work for me.

I see no point in smoothing out a beam intended for max throw. An XPL-HI in a SMO reflector looks great to me - I have many modded XPL-HI V2 5D's and V4 3C's in SMO EDC's, all have a good look'n beam. SST-20's have to be CW/low CRI to get decent throw. The 95+ CRI SST-20's don't throw well.

The point is an all around versatile beam, not maximum throw.

Max throw is not the goal of what I suggested, and given TK’s inclusion of the LH351D and clustered E21A quad on her list of suggested emitters while excluding the White Flat and Boost HX, I’m going to assume she’s having a similar thought. The goal is to be a good EDC light that’s balanced. The D4 is very floody. A White Flat in a 20mm reflector is very throwy. Somewhere between those extremes lie most popular EDC lights, like the Zebralight in my pocket as I write this, or the Lumintop FW1A. Hank has never made a light in that class - perhaps it’s too ordinary when Hank is often pushing the limits, but I’d buy one.

As for high-CRI SST-20s, I have one in my XinTD C8. It’s not far off what an XP-L HI would do, and the better color rendering helps some objects to stand out against their backgrounds. I could put a Boost HL and a FET driver in that C8 and it would throw a lot farther, but it wouldn’t be more useful to me.

Those of us talking about clustered (almost-touching) E21As are familiar with the Cree XHP series, Nichia 144A, and other single-package multi-die emitters. We still want the clustered E21As.

I think the optimization Clemence came up with was to position them slightly too deep in a throwy optic or reflector. That does lose a bit of throw, but smooths out the beam pattern. People who want clustered E21As will generally be happy with that tradeoff.

Why bother? Because E21As are beautiful. They’re prettier than 219Bs, and that’s hard to do.