I did make that up and posted about it in this thread, but others mentioned that they had been thinking about that too.
edit: I think the most significant point of this thread is that it was the first time that the implications of match's then very recent tests of Cree leds on Sinkpads were explored in a flashlight. From his graphs it was crystal clear that XP-G2's (and XM-L2's) on Sinkpads could be overdriven to at least twice the specifications, but people were a bit reluctant to read/trust a bench test (match did see it immediately btw). And back in 2013 the common believe (it still is actually) was that driving leds hard (3A through a XP-G2 was unheard of until match's tests) required massive chunks of copper everywhere, and in this build I realised (as well as match who already mentioned in the test thread that it was no fun anymore with these Sinkpads, too easy, and that he had build his last copper pill, and then he retired :sad: ) that just the very near surrounding of the emitter (the DTP-path under the led) required careful attention to the heatpath, further away any limited heatconducting measure will be fine (the T20 pill screws into a rather thin aluminium tube, but with that socalled 'bottleneck' present, in 10 minutes (surprising to me) the throw went just down from 108 to 102 kcd which is totally insignificant.
+1 for what djozz said above. As long as one uses DTP board the LED should be fine, and there is no need to have copper everywhere in your flashlights unless it is for other reasons.
I have modded a Convoy C8 for one of my friends before by driving a dedomed XM-L2 at 4.2A reflowed on a 20mm Noctigon. On high mode it was measured 90kcd at startup and 89kcd at 1 minute, very insignificant output drop and it was still the stock aluminium pill inside, didn’t add any extra copper plates in the aluminium pill as some sort of “heat buffer” either.
But I know some people still believe that using lotsa coppers does make a difference, or maybe it is just for the peace of their mind. Well, each to his own I guess.
Well, actually, I did, and match did, and Sinkpad, and Cree, and Uniquefire who made this nice host for cheap, and Wolf Eyes who did the original design, and then comfychair did his FET-magic, and...
Okay, okay. I get it. Standing on the shoulders of giants, yada yada. I can dig being humble. But almost all progress is largely remixing the work of others with a little extra, so it still counts as a contribution worth recognizing. And besides, it’s far from the only thing you’ve done here.
Someone may have done it a few days earlier here. Not claiming I invented it though. It was just obvious copper and brass solder well to each other. Surely, I wasn't the first.
the greatest suprice : no flood only the spill with this lens. no rings, only a beautiful focus
the original lens of the t20 remains down and this gives a getempert picture when you look at from a distance because the light is behind three lenses.
