FW3A, a TLF/BLF EDC flashlight - SST-20 available, coupon codes public

I am new to this board and don’t know all the details of this project - just wanted to thank everyone involved and say that this product appears really innovative and cool. An electronic tail switch is something I haven’t seen before in this form factor.

You did mention that efficiency is “reasonably efficient as far as linear drivers go”. But the charts themselves look as if the blue curve was optimal, not merely optimal for linear drivers. I’ve been confused by them when I was more noobish than I am now. I suggest clarifying that right on the pictures.

Also, I believe that Emisar D4 tests have shown that FET was not as inefficient as people predicted, though I haven’t seen a careful analysis of what was going on, one that would enable us to draw lessons for future drivers designs.

A led driven to the max is inefficient for two causes: high current and high heat. A FET driver at PWMed lower modes has one cause (heat) removed so the led during the pulses runs at higher output than if at max continuously.

It really works like that. Example: I made a 18650 zoomie with a Osram KW CSLNM1-TG and FET+1 driver. If I use a high current cell it is overdriven at max resulting in angry blue light. But at slightly lower setting (so still high in the FET region of regulation) the led colour is normal. The led still receives the same current (but pulsed) so the difference I presume is caused by less heat.

Open the photo in a new tab, zoom in (there is a lot of detail there to see), and you can form your own opinion. Those don’t look like o-ring grooves to me. And if they are, why two ? This isn’t a dive light. And the clip was not supposed to clip into a groove, but be Solarforce style, with integral retaining ring.

Or just go straight to https://i.imgur.com/rohcLIc.jpg[/img]

There isn’t a separate tailcap as such in this design, the tube should only ever unscrew at the head, so if this really is just a display of parts in disassembled condition, well, why ? Screw it up please :wink:

Remember, this is where the concept started: http://i.imgur.com/AVSmLGN.jpg It seems a lot has been coarsened since then.

Nice touch putting the piece of packing under the Emissar, and bringing it forwards, to make it look longer

Edit, and fatter

Than it actually is :cry:

I do hope I’ve got this completely wrong, but I don’t see (literally) how I could have.

The design may have something to do with ease of manufacture for Lumintop. I wonder if one of their other lights is similar enough to the design in the photos and instead of setting up tools and fixtures to make a light exactly as Fritz had envisioned it, they are going with their own designs.

Get me on this list for +1 please

Really?
I dont see green in the middle of the tubes.
I would guess its the reflection from the green table.

Why would there be two o-ring grooves on the head side? I thought the clip was designed solely to go on the tail hence the revised chamfered portion.

That’s what it looks like to me too.

At the tail it looks like they’ve cleared a groove for a slip-on clip. If that was merely the tailcap not fully screwed in the interior of the groove wouldn’t be completely smooth. It would have threads and an o-ring slot near the top.

I’m also not quite sure about the groove at the top of the picture. It looks like it has what might be an o-ring slot, but no threads. Did Lumintop just decide to put a decorative groove on booth ends and the light in their picture IS actually fully screwed together?

I guess you are not a tint snob :slight_smile: I unfortunately am and I developed a spider sence for green.

I can’t imagine a reason for posting a picture with the parts not screwed together. It doesn’t make sense to me.

Oh for the love of baby jesus. Please tell me they aren’t going to put a damn snap on clip on this light. That I think, would put a bunch of folks over the edge.

Taking a third look at the picture I now notice a decorative groove on both ends of the battery tube. The groove is the recessed area with raised ridge in the center.

Why do I think it’s a decorative and not just the light partially unscrewed? …. the grooves have no threads in them.

Though maybe I am wrong and those are just slots for double o-rings. I don’t think so though. If it was for double o-rings I would expect the same groove depth at both ends of the battery tube.

In addition to the decorative grooves, the bottom of the battery tube has a larger flat area just above the decorative groove that looks clearly designed for a slip-on clip.

Personally, I don’t like this new look. Looks overly complex. I much prefer the previous prototype.

Agreed. That would go against the whole concept.

I tend to agree with you, and if so, it is quite a departure in design.

Please add me to the list.

Thanks

When comparing the proportions it’s pretty obvious that, like it was said, head and tailcap are unscrewed.

> photoshopped >

Have a look above and next please…

Really??
Or maybe you mean this is the case in the range above very low modes.
Very low modes like ‘moon’ and ‘firefly’ give relatively more blue, i guess the phosphor is not excited by very low levels of 450nm.

But why post that ?

Makes no sense.

Screw it.

And please someone send some proto 4s to the people who are still trying hard, not being lackadaisical.

Sure hope so !!