Why would the XHP70.2 emitter be any less desirable in the L21A than the M21C (that does have it)? I am under the impression that the XHP70.2 has the potential for about twice the lumen output than the SST40. All that said, I could be completely misguided here.
I believe the L21A is powered by just one 21700 cell and can even run on one 18650. The L6 — which costs almost twice as much (as a L21A) — requires two 26650 cells. IMO those differences are quite substantial.
Today I disassembled the M21C and got some measurements of the reflector + glass that a fellow member requested via PM.
Keep in mind that I don't have a set of calipers, so I used a regular ruler to get the dimensions (so there's a margin for error).
Reflector's base diameter: 26mm
Reflector's top diameter: 45mm
Reflector's height: 39mm
Glass thickness: 2mm
Glass diameter: 50mm
And here's some photos of the glass and reflector:
Simon, please start making modes with 1/2-second mode memory. I am so sick of having to wait 3 seconds for mode memory to set. Even 1 second is too long. Also, consider making a control ring mode selector. That would fix this problem.
There is still a place for single mode lights. All my of critical function lights are single mode (Surefire/Malkoff, Surefire/Lumensfactory, Streamlight, IU). Well, I guess that’s not completely true as my firefighting light was a streamlight survivor that could access low and flash by holding the button down for multiple seconds… but in functional use this never was a problem.
(unfortunately I don't have the XHP70.2 variant of Convoy M21C, so here it shows only the SST40 variant)
Convoy M21C (SST40 5000k) beamshot
Convoy M21A (SST40) beamshot (the Convoy C8+ SST40 will perform similarly)
Sofirn C8G beamshot
I'm not familar with the Thrunite TC20 (Thrunite doesn't appear to ship to my country), but based on specs, I think the closest equivalent I have might be the Convoy M3:
It’s from the AR-coating on the lens and is common in many lights that have an AR lens (sometimes different colors depending on what color of AR film is used but purple is common).