I have regular mosled (black), they have decent performance at 2-3A per LED,I don't have plans for mosX version.
Ordered a LD-A4 early saturday to replace the flakey driver in my Astrolux S41 4x nichia. Looking forward to seeing how it performs. Opted for the 12A in case it ends up in a bigger host but plan to use it at 8A max if it finds its way into the S41. The S41 is currently a ‘shelf princess’ - it looks good with the baked brown and copper - but the driver and its click timing is a pita. I considered another H17F (which I am very satisfied with in my desert tan Convoy S2+, my current most-used light) or possibly a TA driver from Lexel (very happy with the 2s srk in my Chimera - amazing runtimes and often used as a nightstand light) but decided to give the LD-A4 a try.
Posted new pcbs on web:
Bare 16mm and 20mm DTP PCBs:
They are compatible with Luxeon V (L1V1), Luxeon M, Luxeon MX, Luxeon MZ.
With installed LED:
Luxeon V on 20mm DTP (with MOSFET+NTC)
20mm DTP ("mosDTP") is not ordinary DTP pcb, this is hybrid version with both DTP pad for LED cooling, but also with 160um layer of Polytronics 12W/mK dielectric material, which makes it very expensive and kind of holy grail for MOSLED method builds.
Actually factory did not make that kind of pcb ever before, so it was questionable if it's even possible. Even with one of the best dielectrics available, thermal conductivity is not close to mosX, so mosfet max. power dissipation is lower, calculations show around 7Watts @60C and 10Watts @25C, this still should be enough for all builds. I'll do some tests to see how PCBs perform.
Edit: Dielectric material is extremely thermally conductive, much better than expected, tests indeed show ~12W/mK, at 10Watts of power dissipation in MOSFET, temperature rise is only~32C, so it can handle practically and known LED setup, dissipation is mosfet limited, not board limited.
Except Luxeon V, main reason I made these boards is Luxeon MZ, domeless quad-die 3V LED, which should do 3000-3500 lumens on single cell with good bin.
Ok, thanks.
Convoy M1 with Luxeon MZ 3V 5700K 90CRI led on mosDTP powered by 12Amp LD-B4:
Ceiling lumen show around 2200lm LED lumens which matches Koef3 test. Tint is very unusual because of combination of high CRI and hight CCT. Beam uniformity is best I've seen, just pure white light without color deviations. It looks like there is small donut hole in center of beam, but it's not very noticeable,in any case much less annoying than CREE XHP50.2 purple spot and greeny/yellow corona.
Test at 100mA:
Mini review of the LD-A4 3Amp + ILC-0
I wanted a nightstand light for a while now, with a illuminated tailcap. But havent got the skill/patience to add a bleed resistor to a driver.
So when i noticed the LD-A4 that had it built in, i ordered it immediately. And the ILC-0 (Default LEDs Current).
Also ordered a red Convoy S2+ because i like the look, and the metal switch.
The light is going to be a nightstand light, so it’s never going to see hard use, so the IPx rating was never an issue. I also got the 60* TIR lens from the convoy store to get a wide beam, as it’s being used indoors, on very short distances. Often in complete darkness, so no hotspots 
The internals came way before the host, so i mounted them in a BLF A6 host temporarily. To tryout the driver, settings n such.
I did run into the black gasket on the metal switch -issue. So until a clear gasket arrives in the mail, the light has a clear rubber button installed.
Also had to grind down the inner side of the driver retaining ring, as it was touching the LED +/- solder.
The ILC-0 (Default LEDs Current): is perfect for a nightstand light, it’s very very subtle, just the right amount of light.
The LD-A4: Very impressed. Genius menu/submenu setup. Very intuitive. The emitter is a Nichia 219C 4000K. So I like that i can choose between “Constant current and Direct drive on high mode” in the menu.
And the other options, very much can be changed in the menus.
The ONLY complaint i have against this driver, is the moonlight mode. There are three current settings for moonlight; 2.5mA, 5.0mA and 7.5mA. I wish a lower option was possible, as 2.5mA (in my eyes) is still too bright.
Other than that, this is by far my favorite 17mm driver :heart_eyes:
IMG Album: Convoy S2+ with LD-A4 3Amp + ILC-0 - Album on Imgur
Will you be selling the luxeon MZ? It looks great with the 90 CRI options available but can’t find it anywhere…
It is at Mouser and Digikey, but 90CRI and 3V just comes in 5700K.
Anyone put the new springs “phosphor bronze 12x9x1mm” in both sides, in the driver and in tailcap? In other words, the usual host like Convoys will work ok with 2x of this springs or the cell(unprotected) will too tight?
I have 2 of this springs and in the “max compresion form” still not flat, in other words, not nearly as flat as steel springs or phosphor bronze springs (fasttech)
I hope you understand me, its difficult to explain this with a limited english like mine.
For me they worked but felt just a little too tight. I cut the down with some pliers and they work perfectly
I have 2x bronze springs in S2+. With 18650 tube they were very tight, but still acceptable with unprotected cell. With 18350 tube they were too tight, I have cut down one of them by half.
Thank you for review! Lower current moonlight modes are possible, moonlight is dependent on two small (0402) resistors, so without hot-air and steady hand it's hard to do for most people, but if you want custom low current moonlight, please leave a note during future orders,and I will change resistors.
Digikey and Mouser have 90CRI 3V version, so I don't have plans for that LED, unless interest is big enough.I'm still considering 5000K 70CRI variant which should be available in T flux bin, but only if there is also enough interest.
Well well well, you have yourself another order coming soon 
So what mA should the target be? Perhaps someone else can chime in.
My benchmark is the ReyLight Pineapple’s moonlight mode, or the BLF Q8 Narsil moonlight level 2/7
Thanks for the feedback!
What about 32mm 3x 3535 Mosled board with Fet and temp conexion? I think it will be popular for x6,c8 and others builds. I will I would buy a couple of pieces, for sure.
Just one note: you can choose two moonlight currents, third current is I1 + I2 (default I1=2.5mA, I2=5mA, I3= 2.5+5=7.5mA)
For example you can have I1=1mA, I2=2mA, I3=3mA etc.
Noted :nerd_face: :+1:
I will do that in next mosX batch, plan is to make 31.2-31.5mm (to fit EE X6 without sanding) MCPCBs for triple CUTE-3 and quad CUTE-4 35mm optics, with central hole of course, and with 3535 and 4040 footprints.
Also I want to make 30mm mosx triple 4040 for Sofirn C8F, triple reflector on that light is great.
Good news Neven! Continue the great work 
Triple 4040 for X6 triple would be great, in fact I’m going to put my next X6 triple project on hold now that I know it’s coming. I’m wondering if luxeon MZ is compatible with CUTE-3-SS? For sure it must work nicely with CUTE-3-W and CUTE-3-M.