Simon, there is a growing selection of drivers and LEDs in your store. Could you divide the “LED, Driver” subcategory into two separate ones? “LED” and “Drivers” separately. It’s getting harder and harder to find anything.
Below I pictured some revisions of S2+ SST40 4-mode driver.
top pic shows the earlier SST40 4-mode driver (softer spring with spring-bypass wire pre-installed) ; driver spring is "triangle" shape. ; tailcap current measures (to verify again... something like 4.5+ Amps I think)
middle pic shows a fairly recent SST40 4-mode driver (a bit stiffer spring, not factory bypassed) ; driver spring is "cylindrical" shape ; tailcap current measures around 4.45 Amps
bottom pic shows a new SST40 4-mode driver (even stiffer spring, not factory bypassed), driver spring is sort of "trapezoid" shape, tailcap current measures around 4.8 Amps
bottom pic also shows the new S2+ body screw thread -- it will not "lego" with the 2 top S2+ body tubes. (the earlier shade of grey is also slightly diffferent (earlier S2+ gray is like a shade of bluish-gray, compared to slightly darker grey in newer S2+)
I would suggest coating lens on only one side. I have bunch of HI CRI emitters but all of them in Convoy hosts have higher DUV, more yellow /green than they are in other flashlights.
I have S2 reflector in custom host with only one side coated lens but the beam is beautifull with Nichia.
219B.
on the other hand having the same emitter in S2 with the same reflector gives more higher DUV beam.
Not really a deficit going to the larger die led. Like Obewan said, the 2mm2 emitter is more useful for everything but lux and throw. The smaller emitters beam is so narrow and the hotspot so small up close. The 2mm2 is much more useful in terms of side illumination and general usefulness.