Hi All,
I am looking for the best way to collimate light to a 5M square or circle at around 80 yards, with as little spill of light as possible. An off the shelf flashlight would be easier, but a custom build isn’t out of the question! It also has to be as light and small as possible.
Have any of you got experience in this sort of thing?
Thanks,
A square is easy, a zoom flashlight will do the job, like the nice SWM T25C, currently for 19.99 at Gearbest with coupon LEDFLA : http://www.gearbest.com/led-flashlights/pp_333584.html
A circle is not so easy…
Only when you take a SBT 70
Regards Xandre
Welcome to BLF!
The MTG2 in a zoomie gives kind of a round projection.
But it requires lots of power
Wow. I’m surprised to see this light selling for this low. It is a very nice light and a good upgrade to the uf t20. In my opinion atleast.
Thanks Guys ill take a look at your suggestions!!The flashlight will only be used for about 20secs at a time so power souldnt cause a problem,spill of the light would be my main problem,
Thanks djozz. You have just cost me $63.00 that I was not spending this morning before I opened up this thread. Hmmm. We need a djozz blocker preventing us opening threads he has posted in. 
Went to buy the Sunwayman and GB is charging me $1.81 shipping. Is everyone else getting charged for shipping. Has always been free in the past.
Yep. I had to pay for shipping and insurance in case they stuff up.
How would the T25C compare against the Brinyte B158 XP-L HI?
Thanks djozz and MRsDNF.
Except for those stupid holes in the bezel leaking light out the sides, this would be a good choice for Bugs. He’s trying to avoid any side light pollution for a specific reason.
Sipik SK98 might keep it that tight, not sure. There’s always the Jaxman Z1. It takes a 26650 cell and as such is a bit larger light, but it’s still quite small.
Edit: Z1 with SBT-70 at 100 yds, approx 16’ to 20’ wide…
An XP-L HI would be considerably tighter, as much lumens as the big Luminus at much less amperage. (it’d be square, of course)
Thanks dale,interesting,Iv found the flashlights that use (dont know the real name) but i call them a frog eye lens to focus the beam ,seem to loose some of the power of the light compared to ones that use a reflector to produce the beam,the old stage super trooper type beam would great but this things got to be small !! the acebeam K7 looks great but its quite big and has a lot of spilled light ,Thanks dale and all you guys for taking the time to reply.
Sorry about that Steve, all I did was copying the code from the Gearbest deals thread. I might save myself some money by blocking that dangerous thread 
But the T25C is a nice light for sure, and as a host not as easy as the good old UF-T20 but still very moddable and the lens seems a bit better. Mine does 181kcd with a dedomed XP-G2 S4 2B.
Seriously djozz? A de-domed S2 0D in my Convoy L6 does 439Kcd… sure would have thought an aspheric (bugs? you listenin?) would throw further than even that large smooth reflector…
I think the T25C for $19,99 is a very nice host, I tried drifferent driver/emitter setup before ending with this :
The T25C is a small light, the used lens diameter is just 34mm. It is the 4th from the left.
Ahhhh, yeah that would reduce it all right. Pretty cool, sure wish they’d forgotten to drill those dang holes in the bezel!
One of my Epileds 400nm emitters looked like that, with light concentrated near the bond wires. Another one had the light nicely spread out over the entire die surface. Epileds is still not on top of consistent quality.
Bugsy? I’m checking something for you… I have an X5 in aluminum that I modded with an AHorton aspheric, it’s fixed, not zoomable, I’m charging it up and will see what the lux is on it and how small the die patterned hot spot is. I know it’s larger than a lot of em because of the AHorton and the (I think) XM-L2 de-domed. Anyway, I’ll check it… it’s tiny and would be super easy to carry.
Edit: Not sure why I’ve got an XM-L2 U4 1C in this, but it’s only doing 55Kcd. Hot spot is pretty large. I can try popping an de-domed XP-G2 S2 0D in it and see what it does if you think it’d work for ya.