In the drawing it is a copper ‘fin’, at least as thick as the thermal slug of the LED’s width.
The weak spot of the heat dissipation is still the LED itself, not the fin.
I think it will be no problem to run any 3535 on 10+ Watts.
3 fins forming a ‘Mercedes star’ would look cool too. 
Ah yes, back on topic, maybe i’ll start a topic on the recoil idea, for this light that deeeep reflector 4wheeler proposes looks very interesting. :+1:
If you haven’t already, have a look at this thread. The throw is just a function of the apparent area of the reflector or lens and the luminance of the LED.
The standard reflector misses the light directly above the LED, but even though this light is the highest intensity, it comprises only about 25% of the total light emitted from the LED. This might seem unintuitive, but it is just a consequence of geometry; the light at more of an angle is less intense, but there is more of it. So an aspheric light might collect the highest intensity light from the LED, but it is only about 25% of the total light.
So I agree that a proper recoil setup could be better in terms of light collection, but it won’t be as much of an improvement as you might expect.
I read that some years ago i think, but i’m not sure what the terms used all mean exactly, so it’s kind of wasted on me…
this (i assume) is 70% of the 180°?
Or is it 70% of the actual light emitted?
This depends also on the relative depth of the reflector.
It will have the tighter beam though and the intensity of a reflector and a zoomy combined.
But enough about it here, i will start a topic about a recoil thrower when i come up with a catchy title.
(and i made a new drawing, 145° in stead of 180°)
IM supplied an estimated throw with XPL HI. Response is:
"optical simulation of the xplhi LED with the 100-1332 LED. With 1klm, the intensity collimation is around 200 - 235 cd/lm, and 2.5 deg beam."
Not that I want this project to end up as an aspherical thrower, but does recoil flashlight throws better than an aspherical flashlight? Or is it significant?
Does recoil thrower have spill?
I’ve never own any recoil thrower so I am not sure.
A few things I noticed, and of course I’m interested… for Justin and Valerie, the BLF JV Classic. The classic from Thijsco19 looks almost exactly like an Olight SR-90 Intimidator. Might have to make some changes to the fins to get away from any copyright issues. Other than that, the simplicity of form as a carrier of function just works.
I put an XP-L W2 2B in an Convoy C8 yesterday (day before?) and got 2028 lumens at 6.6A. Something to think about.
What about the intensity in cd?
Will update OP later
Behind the scenes TA and me are pmming with 5ar for a more in depth render of a design that is based on the Q8 design.
It will have its own look 
And I overstretched, for the groupbuy we can surely make sure Justin gets a donation for each light sold but after that it is probably much harder to keep that going and by making that a hard demand it could make it harder to find a manufacturer (or make manufacturer decide to make a knock off of the GT to save the $ and hassle). I will ask for it though but for now realistic a donation per groupbuy light.
Lets just hope and pray something comes out of this.
Interested. Please put me on the list.
I’m interested in this light- please add me to the list.
Please add me to the interest list!
Put me in for one please.
Hmm, that would mean a total of ~300kcd? Seems pretty low for such a large reflector? The TN42 gets 2x that much with a much smaller reflector?
This is a domed LED correct? First off where are you finding these? I have not been able to find any W2 in neutral tints (although even 2B is not neutral).
In a pre-made light the LED needs to be a HI LED from the factory. Dedomed versions will be for modders to do later. It is simply not practical to sell a de-domed light from the factory. Too many possible issues plus the tint shift would not mesh with most people, including me.
So that leaves a V3 HI or an XHP35 far as I know. (assuming we could even get a V3 XP-L HI).
So XPL hi or XHP35HI?
Any other LEDs worth considering?
Haven’t seen this level of power in a binned domeless emitter from Cree. It could be in the works, but I haven’t heard anything about it.
Cutter in Australia is selling a W2 2B, it’s warmer than one might think, not sure if that means the tint bin is incorrect or just what is going on there, but it definitely shows up as a warm tint when viewed under a UV source.
Absolute long range output will almost certainly have to rely on the XHP-35. High output HI variants are not readily available and even if they were, the domeless emitter doesn’t produce throw like a de-domed high bin XP-L, proven fact. I’ve gotten 2 dozen of the new XP-L and they came on 10mm aluminum mcpcbs, attached in a sheet. It’d be comparatively easy to de-dome an entire panel at a time in a solvent, so it shouldn’t be completely out of line for consideration here.
Jerommel, if indeed all the light is produced in parallel rays from that recoil type of lens/emitter arrangement, wouldn’t we have a relatively large diameter beam profile? Wouldn’t this be non-conducive to extreme throw range? And wouldn’t the arm be subject to damage if dropped? A small amount of mis-alignment and the beam would suffer horrendously. Even if there were 4 arms for strength, could we rely on a manufacturer to nail perfect placement of the emitter? Tricky stuff there, interesting yes, but we can barely get some of these folks to get focus and centering right with centering rings.
Are there working examples of this recoil type of light out there that might give an indication of performance? All I have seen have not fared so well.
The issue is getting the factory to do reliable de-doming and then you have the un-escapable fact that they will tint shift.
While acceptable as a mod for sure, the average joe would see that and go yuck. The De-domed lights I have I don’t even show off anymore, people always mention the color after being amazed at the intensity.
Plus I figure that anyone that is interested enough in max throw also has the ability to install a de-domed LED. Particularly since this light will be designed for easy modding.
The base LED needs to be a factory emitter IMO.
The only way I can see that a factory emitter is going to make long distance throw is if it’s the XHP-35 HI. No other factory variant I know of will do it.
MaxToch built many many MANY lights, factory de-domed.
The real issue there is availability of a proper tint binned emitter for the start point. An 0D tint bin works out pretty well, but is it being made in the W2 format? I’ve only seen 1D and 2B offered, and the 2B is not what I would have expected, showing out more like a 2D or 3A, definitely warm white and not Neutral. I used to always use 2B’s for triples, in XP-G2, and they tend to show a bit on the blue-white side. These W2 “2B” are a bit on the orange side of white. Very powerful, yes, but I’m fairly positive the 2B is not correct.
Look at these 2 panels of W2 under a UV source. The top panel is from about a month ago, the bottom panel was shipped last week, arrived Monday, as W2 2B, although they are obviously not.
So, my primary point is that while there may be a new emitter with outstanding power level characteristics, it may also be difficult to obtain. Modders may have fun with it, and who knows, by the time this light is actually going into production maybe things will be different. Certainly easy to see that a ~2000 lumen de-domed XP-L W2 would have a more concentrated light output for epic throw…