I have one on a 20 mm MCPCB, 2 bare. Looks like the Vf is slightly better than a XPL-HI so may be hard to get to 8 amps on one cell, FET driver.
Trying to decide what light - thinking of a FT03 but also considering a WT1M. The lumens output is disappointing but that's not the point with this LED. Still, how could they rate it at 3024 lumens, not 3020 or 3000 but 3024, where at best it does about 1800?
I was hoping it would beat the SFT-40 in lumens and throw, but we'll see how it does in throw.
Enderman - What is a circle die mod? Is that JB Weld? I know it must work because you wouldn't do it if it didn't
3000 lumens would be ridiculous at 8A. It would rival the efficiency of a XHP70.2 but domeless and only 2mm^2. It would also have 50% higher intensity compared to an Osram W1. I contacted the seller on Taobao and he/she also quoted 1800 lumens which is very close to Djozz’s test.
If it had a better spectrum and could be pushed to 2000 lumens at higher current, it would be the best emitter on the market.
Djozz got ripped off. I received mine today - two days early - and as Tom stated, mine are not like djozz’s samples. They have clear silicone and a glass lens. Let me tell you…
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They are friggin awesome! Tint is perfect on turbo. Slight green shows up on lower modes with the Convoy 8A buck driver, but seriously. PURE white at 8A. A quick and dirty output test showed the same peak current. 8A and 3.99V. Take the lumen value with a grain of salt, as I didn’t do a “calibration” run (will get back to that with another sample later), but I’m getting 1900 lumens ! EDIT: After running a calibration, I’m seeing 1780lm de-lensed. No more left with a lens to compare.
Beam out of an L21B is near perfect. I say nearly because there is an odd “eyeball” artifact that I haven’t figured out were it’s coming from yet. But I literally just got the light together a few minutes ago. 370kcd with initial focusing and a 30T@4.03V
I’m so excited. Honestly this is the most giddy I’ve been in a loonngg time with this hobby.
More to come.
EDIT 1 - Just popped off the lens (by accident actually, which means it came of clean as could be) Artifact is gone! Focus height is different now because I changed gaskets so I don’t know what is responsible for what, but now I’m up to 384kcd with 30T@4.01V
EDIT 2 - Charged the cell. 4.23V (not relaxed, hot off the charger) Raised the reflector a bit with one layer of tape, need another I think b/c the corona is still a bit bigger than I’d like. 408kcd
How is it better than a PM1 though? Sure it’s a bit wider, but i get 1,345m in the L21B. Can’t remember what that is in candela now. I also get 1,200m with the SFT40 which is higher than yours for some reason
My lux values seem to come in a bit lower than everyone elses by a few percent it seems. I remember no matter what I did, I couldn’t hit your SFT40 numbers.
384kcd is 1,239m >> 1,345m would be 452kcd
Lumens wise, the boost HX from Simon maxed out at 1,560 in my light box.
That’s the problem when very few are using a calibrated lux meter, who knows who’s is correct. Mine reads 5% higher than Marco’s over at 1Lumen, but that still puts it higher than your measurement.
Also in my calibrated pvc tube I can’t get higher than 1350 or so at 30 sec, same as Tom E. At start it’s a little over 1450, guess no two LEDs are going to be the same though. My L21A/B stock tests 1200-1350
Ok, I'm there with Jared. Popped it in a FT03 - yes, the beam and tint looks pretty darn good. Did some tests at different amps/cells on the stock driver, but I got spring bypasses installed. at 8.6 amps, throw dropped to 460 kcd, but at ~8 amps on a Molicel P42A I got 493 kcd, 1485 lumens at start.
Funny, was look' at the plastic piece over the LED and looked like there were holes on the side so could easily pop it off - interesting. Will post pics.
One more live update. 415kcd 30T@4.20V and bezel loosened until my eyeball said ‘perfect’. I think this is maxed out here.
I’ve got two emitters left. Where to put them? TN31 that is currently doing 526kcd with an SFT40 running 9ish amps and did 565kcd with a PM1 running 7.0A. These numbers sound too high to be true, but 700kcd is my estimate in the Thrunite at 7A.
Then there’s the C8+ or M2 with ramping driver… B158B… Jacob A60…
Just bought 10 more before these unicorns disappear
Definitely 7.1 amps does better than 8 amps, but ever so slightly. yea, gotta get the lens off.
lumens is maukka cal factor and throw is taken indoors at 5 meters on a Extech LT45:
7.1 amps: 497 kcd, 1515 lumens at start
8 amps: 493 kcd, 1485 lumens at start
These #'s are decent enough, in the realm of the Boost HX but a lot cheaper. Really wanna see it in a aspheric though - should see a nice circular spot -- wayyyy overdue.
Awesome work. I bet you see 510 or so with the lens off, just a guess though. Interesting that 7.1 is better than 8. I’ll test another emitter with some finer current steps near the peak. I was super sloppy with my first pass. It was just to make sure this version was in the same ballpark as djozz’s.
I'm giving up for the evening - made myself a nice margarita. Just got an email from Neal and i replied for him to check out our results here. Neal is way, way too good to me... He's including a couple of SFN55.2's in my order of the MT70 Mini SFN55.2
I should’ve stopped. I just popped the bond wires on my second sample while running another output test and shorting the leads. The power supply was too slow in folding back and poof. Ahh well, par for the course I guess.
This didn’t happen before I got some good data though. I’ll plot some stuff later but here’s the raw numbers
Amps - Lux*10
7.0 - 305
7.25 - 307
7.5 - 308
7.75 - 309
8 - 308
So 7.1 sounds like a darn good place to be.
I’m putting my last one in a C8+ for tonight since that’s easiest. Maybe I’ll swap stuff around and get numbers from the B158B, TN31, and M2 next week.
It does not sound like the version tested in the OP performs much different from the one with the clear window, right?
According to the seller’s page, I would have received the 5900-6300 version by accident. I measured the CCT at 5300K which is in between the two versions so it could be the case. That would explain JaredM’s better tint.
I think the seller mixed things up, cause I brought the two versions, the natural white 5000K and the cool white 5900-6500k, and the cool white showed a terrible green tint, but the 5000K showed a 6500K perfectly white light, with little green at lower current, and the green completely vanished at high current, so, based on this, i think that the seller got confused when making the product page on AliExpress.
The power supply was too slow in folding back and poof. Ahh well, par for the course I guess.