Luminus SST-40, a N4 BA bin tested

thank you djozz for taking the time and effort for doing this tests, you are a wiki to me plz dont stop

Thank you 1000 times

We have something in common gamezawy. :slight_smile:

I got my SST-40s that I ordered from Shenzhen Great Technology on AE. All three appear to be the real deal. I also got one from Kaidomain and it is also a real SST-40.

There are some slight imperfections though. The one from KD and one of the Aliexpress ones are slightly raised. Probably not enough to be a concern since there is still solder under the center of the emitter. I will probably try to get the Ali one seated correctly since I plan on driving that one harder than the others. The DTP copper feels soo much nicer compared to the thin aluminum boards the others are on.

Dave G is this the seller you bought your leds from him ? Store:Shenzhen Great Technology Co.,Ltd.

About heat:
I tested in a convoy C8 host samsung 25R battery, 10x7135 3500ma driver and with xpl HI the light got 60°C after 15 minutes.
Same everything with SST40 I got 61°C.
The XPL HI output with full battery is 1056 lumens and the SST40 I measured 1122 lumens.

@ gamezawy - Yes that is the seller I bought from.

I measured 8,2A and 1938 lumens with TA17 driver in Convoy C8

Im really liking the tint on this SST40 from both Shenzhen Great Technology and Kaidomain. Im not really a fan of colder tints but these turned out surprisingly nice. It has a pinkish white tint compared to the blueish Cree (cool white) emitters.

I have them DD’ed in a Convoy C8 and it is performing really well. Very happy with them.

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… :smiley:

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 :slight_smile: 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.