Andúril 2 coming to Sofirn - The general Sofirn development thread

I thought this was quite well known. Here is a direct Djozz comparison from this thread. This is a 3,000K, maybe this particular version has lower output? The G2 in this test is a 2B tint so around 5700K. Maybe it is around CRI 70? That might explain some of the big gap.

Maukka’s test above shows higher output, but I can’t find any tests from him on the XP-G2 or 3 for a comparison.

The general characteristics I remember from the SST-20 is it’s cheap, looks good, throws well due to it’s small die size, but output is lower and it runs hotter.

The 3000K and 4000K are high-CRI only and therefore significantly less efficient. 5000 and 6500K are 70-CRI only and still compete with much larger die emitters in output/efficiency.

On Emisar lights for example the max output of the former is listed at ~3000lm, and 4200+ lm for the latter.

I think all the SST-20 tests I’ve seen were a while ago and they were all high CRI because that is what people seemed interested in. Like with FW3A for instance, the SST-20 were only for the WW tints then they switched to XPL-HI for NW and CW. You could see the big difference in output and heat. Maybe I have not given the cooler tinted SST-20 enough research. I haven’t fully read Maukka’s 6500K test. Maybe they are not as bad as I thought (efficiency wise).

Yeah for sheer output while having very high illuminance the cooler SST-20s are pretty solid. Only issue is how green the beam is compared to other options like X-PL HI.


SST-20 6500K:

Who’s numbers are these?
It’s not an apples to apples comparison due the dome difference, but still pretty close. Especially considering the XPL has a 2mm2 die and the SST-20 is closer to 1.20-1.25mm2.

Looks like the XP-L HI data points are from Texas_Ace and the SST-20 ones are from maukka

IDK how it’s “not apples to apples”. The X-PL HI is dedomed but the effective die size of the SST-20 is still smaller, that’s why its throwier. The point was that it’s comparable to emitters with a larger physical die in output and efficiency (but unfortunately has a pretty gross beam in comparison).

Gchart is right on the sources

Ooof, that TA chart is from Jan 2017. I think TA’s integrating sphere was reading a bit too high back then. We may need to adjust those results down a bit. When we do that the 2 LEDs are actually pretty close to each other even with different die sizes.

It would be a better comparison if it were the domed XPL compared to the domed SST-20.

Yes and no. :wink:
With optics, XP-L HI and SST-20 have quite comparable beam widths; the latter being a bit narrower despite having a dome.
For most uses where one would consider XP-L HI, SST-20 is worth thinking about as well.

BTW I wish there were intermediate CRI variants of SST-20. And a factory domeless option.
CRI95 is indeed inefficient, the price one has to pay for pushing CRI this high is very significant while CRI80-90 is not so bad in other modern LEDs (about 5-10% for 80, 15-20% for 90). CRI95 in SST-20 costs very roughly 45% output. :person_facepalming:

I just got an idea...

Looking at HaikeLite's new HT70 I wonder if Sofirn could consider upgrading their SP33 V2 (boost-driven 6V XHP50.2) with the new Luminus SST-70 including SMO reflector. According to Djozz' test it should output around 3.500lm at 5A (that's about the max. current SP33 V2 used). They could call it "SP33 V3 Pro".

SP33 V3 = 3V XHP50.2, FET driver, OP reflector, proprietary Sofirn UI

SP33 V3 Pro = 6V SST-70, boost driver, SMO reflector, Andúril UI, desert tan color

There would be no increase in output. Lumens might actually be less. The only advantage would be more throw distance since it’s a smaller led.

I really hope the majority is not always looking for more and more lumens, only. There are so many advantages to be expected such as a more stable runtime (even on turbo), less tintshift compared to the 3V XHP50.2, better throw and - most important - less heat generation at 6V. You need 10A at 3V what you can achieve with 5A at 6V.

Sofirn is currently working on a new corporate design, including a new slogan they may put on their cardboard boxes. The slogan should ideally reflect following content: high quality, reliable products, great customer service and affordable prices. Your input will be deeply appreciated. :THUMBS-UP:

You were saying earlier you would expect a 1000-1300 lumen increase. I was saying it would be about the same lumens.

There would be no increase in runtime and no change in heat. 10A at 3v is the same wattage as 5A at 6v. 10 x 3 and 5 x 6 both equal 30 watts.

You would gain throw at the expense of a smaller hot spot. This change could be an advantage or a disadvantage depending on your needs.

The only real advantage we can all agree on would be better tint.

In a light other than the SP33 50.2, things might be different.

I disagree. A 6V XHP50.2 runs much more efficient at 6V 5A than a 3V XHP50.2 at 3V 10A. Regarding the lumens output I was referring to Djozz' diagram (3.500lm @5A), that's why I expected the overall output to increase. Again, what good is a 3.500lm FET light that will step down very quickly due to excess heat and that can only reach this peak value once and only with a fully charged battery while you can get a bit lower but more or less constant regulated output with better components (boost driver, higher voltage, better emitter)? My impression about SP33 is that many people were asking for the SMO reflector to get more throw. This would be a great opportunity to have both better throw and better tint without defining everything new again.

I don’t think there is any opinion as far as 10A@3v and 5A@6v. It is basic ohms law. We are talking about the same amount of power.

If you look at that diagram

you can see the dark red line which is the 50.2. It is virtually the same output at 5A@6v. And this is an older J4 bin 50.2. Newer versions have better bins with a little higher output.

Also keep in mind that just because a bare led measures 3500 lumen doesn’t mean that you will get the same from a flashlight. You always get less due to losses in the reflector/optic and lens. In the SP33 50.2 I measure about 2200 lumen out the front (OTF). I did not measure current at the emitter, but I think it’s about 2.7A or so. I measure 5.8A on the battery. 2.7A on that chart, plus the losses gives you about 2200 lumen OTF.

With a FET driver you are not regulated to 5A@6v. You might get 8A or so and then you might see 3500 lumen OTF. Of course the wattage is now 40W, a 33% increase and it will generate more heat.

If you used the SST-70 in the SP33 50.2 boost driver version you would get nicer tint and longer throw, even with the stock reflector as it’s barely textured. If that is what you want, it would be a good swap.

BTW, why are we talking about 5A@6v with the SP33 boost driver? I checked my notes and it’s way less than that. Probably about 2.7A@6v.

Every time I see this thread title I think - “I rike-a-brite rites”

Sorry, back to the regular program…

“Sofirn, So Far, So Good”. I know it has much punch when delivered by a squad of steamy cheerleaders.

or So FIRM

As like, someone to build on, a company and products to trust, a solid company.