Uniquefire UF-T20 mod: 3.05A xpg2-3C dedomed on Sinkpad

I'm sorry, nothing is stock anymore when in my posession for a while . And I'm the only flashaholic who does not own a C8 (don't like the design).

My ceiling bounce lux-readings are always compared to a Thrunite Ti with a fresh Duracell alkaline (that is said to output 60 lumens), to convert them to lumens. So the lumen numbers are not very accurate, but I would be surprised if they are more than 10% off.

Has anyone here on BLF actually calibrated their luxmeter? Is it doable at all?

lol… i think im the only one without a working p60 host or an sk68… same reasons

you are not alone. i don’t have a working p60 host(as long as enough parts to put one together doesn’t count) or an sk68 either…but i do have two c8’s!

Thank you for such a great detailed how-to post. I have 3 T20’s and have been rather pleased with their stock performance. But now after reading your post, Im completely amazed with your results in such a small and easily modded package. Your reflow of the sinkpad directly to the brass pill was brilliant! In an age with more and more AL pills, its nice to still find some made of brass. I have 20mm sinkpads and some 16mm on order. Thanks to you and tecmo, we all now have a relatively easy conversion for the cheap pocket mega-thrower. Also, I didnt realize the lenses were glass. They are all very good quality in the 3 examples I have, as are the hosts. I also agree with your observations about the heat sinking. Even when not on sale, these lights are still a great bargain. IMO, buy them before they change the pills to aluminum. Those are usually the first changes they make when trashing a once great light. Next will be the lens.

I just realized that my T20’s were purchased at wallbuys… I hope the pills are brass. Anyone know?
Edit - its brass. :slight_smile:

Probably a silly question, but after your mods, are you happy with the lights performance at the fringes of its range? In other words, does it throw photons way out there?

That looks cool. Now I'm thinking if I should do the same with my Smallsun ZY-C10.. but its made for XRE. :/

Great mod, I love it. The UF-T20 is a great light to mod. I have a direct drive single mode XRE R2 in mine mounted to my scoped rifle. It easily out throws anything else I have, plus I like the fact that the zoom is threaded so it won’t zoom out from the recoil of my .308.

I got a stock T20 from WallBuys, and yes, it does have a brass pill, actually it's a C8 sized brass pill, so got some flexability there. I got an XP-G2 on a 20mm SinkPAD waiting on what to use it on - this sounds perfect, though it's got the dome.

Hey its E1320! How you doing?

Im with you on that nightcrawl do the same thing to a C10. I personally like the C10 better, in the looks and it performs better then in the xre (green) department.

Put it in Tom! Interested in whats the difference in dome and no dome!

thanks for posting this. I’ve been considering almost the exact same mod. I already did the sinkpad soldered to brass pill with a green xpe, but for the next one I’m going with white, but haven’t decided which emitter.

I think I’d prefer xpg2, but I might do xml2 with everything else the same (though I prefer 5000k) so we can compare numbers.

Haven't been camping with it yet, just annoyed some neighbours by searchlighting the little square I live in. I have a reflector based budget thrower build (49mm reflector, dedomed xpg2, 2A) that throws 70 klux, and I don't like the spill much because everything in close proximity is lighted up as well and so distracts from what you want to light up in the distance. This one effectively has no spill at all. And I can also hearthily recommend a neutral tinted led for a thrower like this, very nice in the outdoors.

But to directly answer the question: o yes, those photons get there alright! Huge fun!

Simply amazing results! I can't help but think that it would be even better if the LED was not dedomed. Dedoming works great on a reflectored light because it's the spread of unfocused light from the LED hitting the reflector that helps focus and throw the light down range. In an aspheric light you want the light from the LED focused into the center of the lens, not the walls of the head. Leaving the dome on the LED should focus more of the light into the center of the lens than the same LED without a dome.

I had an XR-E ftt light that I accidentally dedomed and it ruined the output in comparison to when it still had the dome.

Now I wonder where can I get XPG2?

My plan is 3.85A Nanjg, custom programmed, domed, so we'll see if I can make 100 kcd w/domed but at higher amps with the XP-G2. My usual C8 builds are 3.85A with copper discs added, so think it will be ok for the T20 (my builds are typically pushing it ). At those high amps, I've found the Pana PD 2900 is excellent to get full amps for 3.85A with XM-L2/SinkPAD combos, and the Samsung INR 1500 I got from FT is actually a little better.

I used to think the same thing (de-dome for reflectors but not aspheric), but DrJones’ post about this topic claims that throw is increased for aspherics, too.

I dedomed an xml2 for my 7g5v2 and that made a huge increase w/ the aspheric lens.

I get 180k lux @ 1m (measured at 13ft). It has slightly higher current than stock because I upgraded driver wires, and I am using a copper sinkpad. When it was in stock config my measurements were slightly lower than selfbuilt’s numbers for the 7g5v2.

Really?? Do you have a link to that post? I’d love to hear what he wrote about that. I think it’s awesome that it increased output on your 7G5v2. Sure doesn’t make sense on the surface but I’d love to be wrong about it. I may have to arrange for the same mod on my UF-T20. :bigsmile:

20mm pads have been ordered. My already xp-g2 modded T20 will be getting copper and 2.8a in the near future!

Thanks for the detailed post and awesome mod!

Mike

Wow. The XP-G2 continues to impress me with its flexibility. djozz, I think you’ve even usurped the DEFT-edc for size/throw.

last paragraph of first post for a direct comment Flashlight Optics - Dome, Dedoming and Throw

it didn’t make sense to me either, until I re-read his entire post a few times lol

edit: also, i might add, dedoming made the 7g5v2 reflector head somewhat useless for me. the spill is so dim that I might as well use the aspheric…

Well, that would have been nice, the DEFT-edc has about the same length, but the head diameter is 33.6mm versus 44mm for the UF-T20, the weight is 114 gram versus 174gram for the UF-T20, so it really is a bit smaller. The throw of this build is better though, the DEFT gets to 86klux, I measured 108 (I guess that if this light gets a bit better battery and used a cool white led instead of a 3C it may get to 130klux ). So I'd say it's the same league, which is already very nice for a light that has costed me 32 dollars alltogether.

Sorry, still having fun with the light . Want to share this pittoresk rainy beamshot I just made (just before going to sleep). (According to google those two tiny trees in the hotspot are 83 meters away). Good night to you all !