Test of a Luminus SST-20-W 3000K 95CRI led

Thanks for the clarification.

The excell sheet is big, with lots of other led data as well, and I’m not too handy with excel so slicing it to size already is a challenge.
I hope the raw data will do as well? :innocent:

Do you think, this emitter is safe to be used in an Astrolux S41S quad, or in a Sofirn C8F triple?

You should be ok with a (direct drive) triple on one 18650, if it is over 15A you get in the danger zone but with its Vf a bit higher than the 219B you will not get there. More likely you will end up at 9-12A which would be perfect. To be sure you can start with springs without bypasses and measure current.

Not true of the SST-20 in general. Quite true of the high-CRI warm white SST-20s.

I made a Jaxman E2L triple (shorty) with the SST-20 3000K 95CRI, to see how the led behaves in TIR optics.

Unfortunately I only had a frosted triple Carclo optic while I wanted a clear one for this build. I half polished it so that it now is in between clear and frosted.

The driver is a BLF-A6 driver. I will make a lighted tail later so I added a 680 Ohm bleeder resistor. Also I ‘fixed’ the driver from voltage spikes on the CPU as suggested by DEL (not really needed for the very tolerant Attiny13 in the BLF-A6 driver but I did it anyway).

I did no spring bypasses because I do not want to over-stress these leds and this small light with so many amps will become too hot too soon anyway.

The beam is very smooth with no disturbing tint variations, perhaps a true clear narrow optic would have produced a more distinct hotspot.

The tint and CRI has not quite suffered from this optic, to state it lightly, it is as nice as you will ever want it to be.

Hotspot at a mode under 350mA (so regulated at 350mA, ~120mA/led):

Outside the hotspot at a mode under 350mA:

Hotspot at max (on a Vapcell 18350, 1150lm, about 8 amps, ~2.7A per led)

Nice Jozz, can’t wait for mine to arrive. Is that a white wall?

Yes the wall is white, and I even made the effort to post-edit the white-balance of this pic to match my phonescreen with what I see in reality. (which will be a bit different again on any other screen of course).

Nice, thnx for the effort. Planned this led for my reylight pineapple, but I think I will try it in a quad tir also now.

Looks very good. Glad the tint is below BBL so it wont be so yellowish like on the LH351D 4000k I just tried.

At under 3000K the light will appear yellow anyway, even under the BBL, it is the added rosiness that makes it look so good (or boring for that matter, it is indistinguishable from a halogen spotlight).

You underestime this fact. I tried some cree 2700k 90 CRI XD16 and they are green

I’ve tried a Cree 3000k flashlight and it was yellow lime. No way I could use it for any purpose.

Even for general purpose use, I would prefer the rosy on my 3000k 9050 nichia 219b over the yellow lime 4000k LH351D 90CRI.

My 219B 4000k 9050 looks so tintless pure white next to the 4000k LH351D 90CRI.

Djozz, how is the tint in moonlight mode? Just hate it when moonlight turns the tint to crap.

I can not measure that now because I have no bare led reflowed at the moment to check just a few mA. The triple at moonlight is of course a PWM-ed 350mA so if moonlight is made that way the tint will be just as good.

If the cool white version is of any indication, there’s significant shift on low currents.

Good to see your results :slight_smile: Thank you for your efforts.

Then I can expect almost the same amperage with an NCR18650GA for a Sofirn C8F, and maybe it would require a Samsung 30Q for an Astrolux S41.

I think they might have recently revised their triple boards to be compatible with Carclo optics because I just tried the Carclo and it fits perfectly. It’s interesting that KD sells the triple emitters soldered to the board for so much cheaper relative to buying single emitters.

And please remember that kd triple MCPCB is only 1mm, so carclo legs HAVE TO be shortened to ensure proper tension and thermal contact with a pill / shelf.

Good news that they changed their triple board, I wonder if that also implies that the optic that goes with it is the Carclo 10570?