[Closed]

I’m interested in seeing how this project unfolds, though I’m not sure how useful an amber emitter would actually be on a light. I can’t think of many situations where I’d want a scene to look more orange…

Suggest making a lot and put me down for 3 of them :slight_smile:

I’d buy one. Maybe two.

Amber/Red would be great when the bugs are out bad.

Huh I’d love a light that could ramp from red to 5000k! Also please integrate a battery-check option? LED in the switch and/or triple click from off? Removable magnet would also be nice. And type c - c charging with powerbank functionality would certainly be appealing to me and others I think :slight_smile:

How about a mule with different CCTs of Nichia E21As and an included diffuser to act as a lantern? Mixing different E21As seem to lead to really lovely tints below the BBL.

New approach ;-)

Agreed. I have revised my design accordingly to something like that. A concave top reflector might be a good way but I am not sure if the reflected light will still be diffused as desired. So, I thought about placing a biconcave plastic lens into the inner part to achieve a more even distribution of the light into the diffuser. Please excuse my miserable drawing skills. :FACEPALM: However, I hope it makes sense. If not, please comment. Some more guidance would be awesome. :-)

I am not sure how that can be achieved. AFAIK, most flashlight manufacturers cannot preselect LED reels by their Duv or chromaticity bins. It would require handpicking and individual testing with a colorimeter to get that done. I don't think that's gonna happen. Maybe someone like Hank could do these extra efforts with a big surcharge in the sales price.

Yes, USB-C charging with reverse charging feature ("powerbank").

You mean an illuminated switch button? Yes, definitely. I was thinking about something like in the Andúril UI (7x click to cycle between off > low > high > heartbeat) using a red illumination. The green is way too bright in my opinion.

Agreed. A plastic bottom disc/plate to support the lantern's stability would be a nice alternative, as illustrated here.

Done.

I take up this challenge. ;-) As much as I like Andúril (and the candle mode is an important part of it), I try to find a simplier, more essential UI together with Wurkkos to make it also approachable to the standard customer, not only to flashoholics. With their IF25 tint mixing flashlight Sofirn has proven that they can implement a simple but useful UI. It does not necessarily mean that Andúril is ruled out for this project, though.

Since Cree LEDs are more and more hard to get and due to some mixed feelings about amber light (I still need to find out why :-D ) I have suggested another LED, Samsung's LH351B 2.200K 80CRI. Maybe this could be an interesting alternative to blend between 2.700K and deep red?

In some ways, yes it is quite similar. But if I recall correctly DBSAR uses Sofirn's IF25 for LT1M's basis, using a pair of SST20 2.700K and SST20 6.500K? I'm not sure what the latest update is, though. Moreover, this model here is based upon a mixture of WK30 and WK40 (prototype), it uses a different UI, a different diffuser design and a different selection of LEDs for a broader bandwith of tints (at the cost of maximum brightness). I do not mean to interfere with DBSAR's or Sofirn's plans. :-)

I agree with the removable lightweight aluminum/plastic base. Maybe I get to revise the design a bit into that direction. A larger lens with more LEDs will be a hard task because there seem to be only a few optics available to the factory. I am pushing Sofirn and Wurkkos to seek out for optics from Carclo and LEDiL but I do not know how easy it will be for them to get these.

Not an option unfortunately. :-( Sofirn seems to has given up sourcing LEDs from Nichia. Their suppliers seem to be unable to get these from Japan.

Have a look at this presentation about the preference for white light

Especialy, from one of the studies

What is precieved as not acceptable :

According to this, going directly from 2700K to red would even be better than doing a stop at 2200K.

Hmm....would it make sense to use...

1x 5.000K 90CRI

1x 4.000K 90CRI

1x 2.700K 90CRI

1x deep red 660nm

It would for sure gain more overall brightness in white light but also more accentuation on the neutral side of white light, not on incandescent warm light.

I'd suggest then LH351D 3500K 90CRI instead, which would make better mixing. 2700K (to be replaced) and 2200K is too close to each other in my opinion.

so, this could be awesome:

1x 5.000K 90CRI

1x 3.500K 90CRI

1x 2.200K 80CRI

1x deep red 660nm

A quick example :

Using measured data from 5000K wurkkos FC11 (a pretty bad tint), 4000K and 2700K from Sofirn and 5700K from convoy (a relatively good tint : Q1 bin), all with beaded TIR lens at 1A, which doesn’t give result too different from the IF25 optics.

4000K isn’t useful, I’d say 5700K to 2700K is best, 6000K could even be used. My CIE diagram doesn’t show lower CCTs sorry, but it goes to a maximum of –0.0110 duv around 1300K, which personally I would find perfectly good at these very warm temp.

So three colours might be good enough, one of them would be doubled, which I dont think would be an issue, the driver would be greatly simplified with 3 channels instead of 4.

Magnetic tail cap would be helpful for tipping issues if we didn’t want to use the supplied plastic base.

Simple UI is good idea, however I would like to see smooth tint ramping and light intensity ramping, candle mode with timer shut off, option to turn switch light on/dim/off, saves memory from last setting, and lock-out mode.

I'm in for 3 of them, I really like the 26650 support.

Interested!

Highly highly interested!

Anduril version of this?

A removable magnet in the base would be best I think. I’d also like to see a tripod mount like the LT1 has. Don’t know how you’d fit both, but it’d be nice. The diffuser looks big. If it can be made out of a flexible material like the one that comes with the Tool AA or something it might be fine, but that much volume taken up by hard plastic is harder to stomach. Looks like the optics are standard Carclo-style TIRs? That’s a good idea; it’ll let it be usable as a flashlight as well.

i’m in for this.

some ideas:
If we double down on the tripod mount the magnet could have a tripod thread so its screwable into the bottom.
Another use of the tripod hole could be a screwable lanyard hole, this way you can hang it perfectly upside down as well.

Since the light uses TIR it might be a cool idea to have the ability to change the lenses if sofirn is willing to sell the lenses separatly on their site.
Bonus points if the lenses are able to be changed individually so you could for example have a 10degree neutral white and a 60degree warm white.

somewhere above (still finding out how to quote) it was said that wurkkos wanted to have a accesible ui that also accomidates non flashaholics, maby its a possibility that the UI has a sort of simple/advanced mode, simple being enabled by default. sort of like a muggle mode, but not per se with a lumen decrease, however you could maby add a simple+decreased mode as a third option.

For charging, is it possible to make use of the quick charge 3.0 protocol?
That might be able to keep up better with the power drain of the led’s wich is beneficial seeing as lanterns are usually on for a long period.

also is there a ballpark of what the cost will be?

-made a account just to reply to this thread, let me know if i’m doing something wrong.

I missed this thread somehow…
Have you considered a flat white conical mirror at the top to redirect the beam sideways and down instead of a lens?
I think it would be better because even with a lens you’ll have the lantern shining mostly up, which seems the opposite of the ideal IMHO.

Why is the thread named [closed]?