aluminium foil wrap around triple led optic to prevent lumen wastage
Itās not really a mod 
I dont have a light meter but i can tell the different 
Today I āfixedā my new Astrolux S41S. I held off on this guy because there were some issues, but as soon as the improved heads started shipping I placed my order. The light came a few days ago. Overall its a really nice little light, but it had some shortcomings. I ordered mine with the Nichia 219b option, which is nice of course, but 219bās driven hard by this little 18350 cell resulted in some serious output drop. They just sagged like crazy. Also, I learned that these little lights come with the original A6 driver, not the new tiny25 Bistro driver. Booo.
So out came the 219bās and in go 4 219c SW40 90cri emitters. Should have a lot less sag. At the same time I fitted a MtnElectronics tiny25 driver with Bistro and the thru-board bypass, a fantastic driver. Much better. Just for good measure, and because I love them so, I added a lighted tailcap that sorta looks like this. Sorry for the crappy cell phone shot:
One final note: I was surprised to see that the light came stock with a lighted tailcap switchā¦without the LEDs or resistor. Just bare pads. Its the 2-emitter board like is used in the X5/X6 lights. And of course it comes with the translucent boot too. I chose to use a 6-emitter ring board but anyone who just wants a simple lighted tailcap has already got most of the hard part done in their lights.
nice one emarkd
what resistors did you use?
Thanks, it really looks better in person. I should try to photograph it with a real camera. It took some fiddling with values, but I wound up at 120K for the blue, 68K for the orange and 44K (I think, maybe 46?) for the green. Theyāre really close to even but the blue may still be slightly brighter.
did you use bleeder for the driver emarkd?
One more 
for that slick soldering 
Hmmmā¦ 
Thatās strangeā¦
I think it should be parabolic, not with that change of curvatureā¦
Reminds me of the disappointing recoil reflector in the recoil topicā¦
And i was planning on getting a catadioptric myself, but postponing it because of disheartening shipping costsā¦
Itās as if it is not allowed to make an efficient tight beam light with a simple opticā¦
Awesome stuff guys.
I just caught up on this topic and i see great stuff being done.
So i just wanna say: :+1: :+1: :+1:
I was planning to post something about my current mod, but itās not that interesting and my camera has issuesā¦ (actually the USB cable is failing and it has XD card which fits nowhere elseā¦)
But iām doing my Jacob A60.
XP-E2 R5 1A on Noctigon and a 6x 7135 driver, which may be a bit muchā¦
Iįøæ dedoming the XP-E2 at the moment, i use a warmed up mixture of paint thinner and benzene, and this seems to work well.
Maybe iāll put up some pics later.
Wow, I did not know that the XP-E2 came in R5 bin, have just seen it in R4. Where did you find it?
Well, letās say i hope it is really R5, but itās advertised as such here:
I say hope because there was some horrible feedback on XP-L W2 he offersā¦
I saw this after i ordered, of courseā¦
Got some of these on its way too, for fun:
A tiny and quick mod today: I wasnāt happy with the tint offering in the Nitecore TIP CRI, too warm for my taste. So I swapped a 5,700K 92CRI Nichia 219:
Disassembled
The reflector is a 2-piece design, both made from aluminium. The diameter is larger than the centering ring and has a bit of play, making the stock XP-G2 uncentered.
Nichia reflowed and tested
Removed the factory thermal glue and potted with healthy amounts of Arctic alumina epoxy.
Everything back in place
Nice nichia tint 
The tint looks warmer than the picture, I suspect KD sent me a 5,000K version instead of 5,700K. But color rendition is excellent specially the reds.
That shop again ā¦
Both me and Kawiboy have sent messages to this seller in the past without response . (for other items)
Yes. I tried it without first - became basically next mode memory. Pulled it back apart and added one. Oh well. I dont think Iāve built any of these tailcaps that didnāt need the bleeder, but others report different results.
What value did you use?
After potting it Iām pretty sure it will be stuck in that TIP forever
The tint is really nice, unlike any other tint Iāve seen before. Makes me wonder why I still have so many CW lightsā¦
So did i get ripped off?
At first I didnāt use any but it didnāt work in an acceptable way. So I put a 470 in it, because thatās what I had on hand. Iāve used up to 6-700 ohms before with good results. My driver now works pretty much like the tailcap isnāt even there, although it is now possible for me to click too fast to enter the programming. I have to kinda slow down just a bit when doing those 15-or-whatever clicks or it never registers. Not a big deal at all.
No . Itās a good seller but they are not responding in messages of non-buyers.
Looking at the pictures, it also comes with a nice corrosion spot on the centre pad. :person_facepalming: