[PART 1] Official BLF GT Group Buy thread. Group buy officially closed! Lights shipping.

In our quest for more throw, I think beam angle needs to be considered. When increasing reflector size and keeping the emitter the same size, at some point the beam will become just too narrow to be useful. The point at which this happens will be different for different people and for different uses.

If a 120mm reflector and XHP35 HI is used, the beam will be a bit smaller than that of the TN42 with its ~92mm reflector. I don’t have the TN42, but based on the sizes of the emitter and reflector, I think its beam size should be similar to (or a bit smaller than) a UF1504 with XPL HI. In my experience, this is a usable beam, especially at greater distances (300-400m) where it illuminates a larger area. But much smaller than this I think is bordering on too small.

So, I think XHP35 HI should be used rather than dedomed XPL or XPG2. Or multiple emitters, but this increases complexity and cost.

djozz, take a look at the Encyclopædia Britannica picture I posted before:

0K. Imagine the “eye” corresponds to the TIR mounted emitter in our setup. Now, after the short focal distance convex lens (or 2 in series lens team), a sliding concave lens finishes the job:

Well, hope you can see it. Not an expert in optics, you may guess.

Should allow zooming, and should allow to tune the “track” width somehow, while caring little to none about the emitter setup as long as the focusing is well done (TIR + convex selection).

By the way, any known good TIRs for XHP70s? All those old XR-E ones by any chance?

maukka, take a look at this beautie:

XHP35A-H0-0000-0D0UB40DT @ Cutter Electronics 7000K, 90+CRI

Cheers my dears ^:)

There’s really no point in a very cool white high CRI emitter on a thrower. The blue light will wash out colors (and the blue beam in the air disguises what ever you wanted to look at anyway). Also the output is a third lower than with a lower CRI neutral one, that will look much better regardless of CRI.

Mmmkay.

Well, time to figure out how to make my proposed setup with an XHP70. ^:)

A short, threaded tube above the TIR would allow us to finely adjust the convex lens position (with a threaded lens, of course). This should allow us to adjust the beam width… shouldn't it? Of course this middle lens would need to be of a short focal distance, as I said before. Correct me if this sounds wrong.

Sounds fun?

Cheers ^:)

I want one!

Super simple design. 130 mm head. 50 mm battery tube (4s2p setup)

:smiley: :smiley: :beer:

nice! yeah this was what I had in mind too (and I do remember Old Lumens say this would be the kind of light he would want to see produced, so I am thinking about adding some $ on each to give to Justin and Valerie)

I know this will add a lot more complications, but I much prefer if this light will have a side switch. It just makes it so much easier to turn the light on/off with these bulky lights. Changing grip position is not too big of a deal with the smaller lights, but cigar or a tactical grip on these bulky lights then changing grip to your standard grip, may lead to a drop on the floor potentially or eventually. Haha

^

+1 on the last 3 posts. :)

Ehm yeah BIG light + Narsil = side switch (IMHO)

In the tailcap please a clicky for totally off.

Behind the head an electronic switch.

Regards Xandre

I’ve never had the need for a super thrower, but with this development team…

Whenever there is an interest list, please put me down for one.

Djozz wrote: “The debate is lumen vs throw. It will be a big light so will we be happy with a 1400 lumen XP-L HI and try to hit 1Mcd?, or will we settle for 700kcd with a 2000+ lumen XHP35?, or go 4000 lumen / 300kcd with a XHP70? (numbers are a very fast guess)”

Throw please, and lots of it!!

700Kcd with a 2000+ lumen XHP35? - no thanks, I already got the TN42 (680Kcd & 2500 lumen)
300Kcd with a 4000+ lumen XHP70? - no thanks, there’s already lights that to exactly that

1000Kcd + 1400 lumen XP-L HI? YES YES YES

Grtz
Nico

I'm in

Why not 4000+ lumen 1000Kcd? :wink:

NOT because a thrower with that much output would blind you to an extend that the throw would be useless.
Throwers that need to light something up, FAR AWAY should have minimum spill and max throw.

This would not be an EDC or even an allround light but a dedicated thrower, outhrowing the TN42.

Just my 2 cents….

Grtz
Nico

But with this big size you would not get so much spill.

I believe that with XHP 35 is best and we get more than 700Kcd

Or take the new Oslon Black Flat Square we tested with 3,5A on a
copper star ~230 cd/mm²

Regards Xandre

Oslon Black Flat might not be a bad idea - with a reflector that big and 230 cd/mm² we could get over 1,5Mcd………with a pencil beam still, fun and reach!

Grtz
Nico

By far the biggest driver of throw will be the reflector size

XPG3 sliced should be a bit smaller die, and a bit larger surface brightness. Or a XPG2 sliced. If not then everybody will mod it with something to gain the most throw. XHP35hi might hit it too. When you make a Giga Thrower throw is the most important characteristic. There are PLENTY of lights available that can throw a bit, for impressively low price. But almost none that can hit 1mcd. Asking for a Giga thrower to have spill is not getting the point of the thrower. You have L6 if you need spill, or any other light. But us throw people do not have throwers. This will be the first of its kind. And perhaps the best if designed correctly. Please save the spill, lumen and other clarifications for other topics “giga flooder” or “giga EDC”. Here mcd should be the one and only point.