I don’t need this, but what the heck. It’s an impressive collaboration, and the tail e-switch is neat. Put me down for one with LH351’s.
I missed the discussion surrounding emitters - was SST-20 ever considered? I’ve been pretty happy with them in smaller TIR lights. I don’t mean to say that an established decision should be reconsidered or anything, I’m just curious. It’s a swap I might consider down the road, if they weren’t specifically rejected for some reason.
That all sounds good on paper but my Ti/Cu scratch built EDC uses a Carclo quad optic with Samsung LH351D 80 CRI 5000K (U6 power bin) emitters and works quite nicely outdoors in the big wide open area’s we have here. It’s certainly no thrower, but it’s not lacking either, even run on an 18500 cell. Beam profile is sweet, sans the Cree artifacts, with a defined fat hot spot that I’ve found very much to my liking.
From what I hear, it’s not always max. It’s frequently at lower levels, especially candle mode. A lot of people care about the tint in low modes, not just turbo. And unfortunately, a lot of emitters have their worst tints at low power levels. The color temperature and tint can shift quite a bit between a low mode and a high mode.
That’s why I didn’t like the SST-20 4000K 95CRI emitters I tried. The tint was okay on high modes, but I almost never use those… and at the lower levels I actually use, it was a long way from white.
The SST-20s I got from Kaidomain (FB4 tint bin) are kind of yellow at low power and not really my favorite tint at any power level, but I just got done reviewing a light that came with an XP-G2 that I think was a 5S tint bin so I’ll take it.
I’d put more emphasis on getting FA4 or FA1 tint if I was buying a bunch of SST-20s than I would on flux bin. I have a suspicion that sometimes non-green tint and the highest flux bins are incompatible, because adding more 555nm has a strong tendency to increase lm/W, being the peak of human visual sensitivity.
The peak current of FW3A won’t be 1.05A per emitter but significantly more. At higher currents the efficiency gap will be larger when comparing both LEDs at the same current.
Furthermore SST-20 actually has lower Vf than LH351D so it will draw more current. This will make the efficiency gap yet another bit larger, but it will reduce the brightness gap slightly.