Nice!
I tried to get my first sst40 mod working last night but those mcpcb’s from kaidomain were too thin. Have to make a spacer to get them to fit…
I’ve experienced the same. Very nice uniform beam and tint. It’s not nice as in pure white. It definitely has a tint but as was said this tint is a pale purpley tint. Hard to describe as it’s not the normal led tint we are used to.
Has anyone thought about sticking dedomed SST-40s under carclo 10 mm optics? For example with Emisar D4.
There’s no PCB for it, but since die size is similar to the XP-L, it should be floody, but not all flood. And significantly brighter than XP-L HI…
It wont be much brighter when de-domed. Hard to notice by eye and only at super high currents for a few seconds (20+A with three LEDs).
The way I see it:
- SST-40 has similar current-output curve to XP-L V6
- By chemical dedoming you lose roughly 1 bin, so it’s 2 bins ahead of XP-L HI
- But Vf curve is way lower, so it draws more current
Xml2 T6 shows almost the same result as highest bin xpl it is a bit strange. Xml u4 then will be best emiter.
I don’t really agree. I think if you want maximum output the SST-40 is the best from 3V emitters.
Watch my numbers in the Convoy C8 section.
Looking at your (very nice) chart I see that you miss a C8 with XP-L V6 dedomed. It is not that you should have one but with a collection so complete… 
That's a great chart ZozzV6! Very useful for comparisons. Really like the SST-40 beats the XPL2 V6, even at less amps! And the dedoming, like you said, doesn't lose much in lumens, but still nearly doubles the candela. Wow! I gotta order some more!! Have 3 on the way.
Thanks A Bunch for the meticulous work!!!
Thank you!
Half of these lights are one of my friend’s property. And I don’t own 12 C8 at the same time 
I build some of them for request. And for the SST40 tests I replaced the leds and drivers in my grey c8 which earlier had the xp-l2. I wanted to see what mod worth the effortand what led is the best for a specific purpose. I know that I had to try them all but now I can refer things to people if they had idea for a special flashlight. :innocent:
Higher current means the battery sags faster, so the current is reduced faster than at lower currents. Also the light gets hotter.
Correct. Hotter, less efficient, but with higher peak brightness.
My 219c D4 is not too hot with VTC6. SST-40 has higher Vf curve, so it wouldn’t be too hot with this battery either.
Can’t wait for those VTC5As to arrive….
Lots of work there Zozz. Thanks for sharing. :+1:
I have XML2 U4 dedomed 30+pcs. and SST40 dedomed 20pcs. from KD.
Set up in C8 , A17DD , AR lens.
XML2 U4 higher Vf 5A- 1500- Lumen 130,000±cd
SST40 lower Vf 7A- 2000- Lumen 150,000±cd at Level 7
edit :
1250LM 80,000cd at level 6
My batteries are VCT6 30Q HG2 and LK 26650
Thanks for sharing. I was just wondering has anyone tried a dedomed sst40 in a c8 yet. And hours later, I see your post. That’s great numbers. I’m loving the sst40 more and more. I need to get me one.
7A is a lot of current draw for single cell fet dd light. I would not want to put that emitter on my single cell fet builds… Well maybe just one for fun to see how it shines minute or two on turbo
Chunky multi cell lights are different story and they could really benefit from it a lot.
Mine was over 8A
I’m getting 172,000 cd from sst40 in an olight sr52. Not dedomed:) So far its lasting but not sure how long it will.
Edit, I figured out the polarity on my own…
This the correct polarity of the SST-40 LED
Credit for awesome macro picture goes to Djozz 
