(led in pic has broken bond wires )
I have read that koef3 is working on a test on the new SST-20 led so I skip that one, but I did want to know the behaviour of the even newer 95CRI 3000K version of the SST-20 for a flashlight build I want to do, so I did a voltage/output test and might as well tell the world.
It is the Luminus SST-20-W30H-A120, and I bought it from Kaidomain.
A datasheet can be found here.
The test was done like all my more recent emitter tests. I described it in detail in my XP-L test. , with two minor differences that should not matter significantly for the results: I used my Integrating sphere no. II instead of no. I, and for the current I used a clamp meter, which appears to measure 0.1A lower than the power supply current-reading that I used before.
In summary: 1) just one led was tested, reflowed on a 16 DTP copper board, 2) I used my large version II integrating sphere with high quality luxmeter, 3) the output numbers and voltages were measured with the led close to 'steady state' for each current, so warmed up and settled, you should be able to get these numbers in a well heatsinked flashlight. Mind that these are output numbers of the bare led, in a flashlight there will be losses from light obstructions, lens and optic, 4) output is in 'djozz-lumen' defined as 1/550 of the output of my Sunwayman D40A on high setting, which I hope is close to the real lumen (recent comparisons show that it is actually between 7 and 11% high), but at least is consistent over all my emitter tests done in integrating spheres.
Some observations from the graph:
*I put some other high CRI 3535 leds with comparable die size in the graph, I would have liked to add a high CRI 219C but I have never tested one myself so I would have had to transport data from TA for that (his test of the 4000K 92CRI 219C showed 800 lumen at 3A which would be a better output as this SST-20 but at a bit lower CRI). And I added a XP-G2 S4 2B to show how much output you sacrifice when you go high CRI.
*Output and voltage matches very closely that of the 2nd gen. 90CRI 4000K Oslon Square, which is pretty good for a 3000K 95CRI led: low-ish voltage, good output, can handle pretty high current,
*It died from burnt bond wires at 7A
The tint seems wonderful, nice and rosy, but I need to reflow a new led to actually measure that.
(30 minutes later), I did a new reflow and did one quick light quality measurement of the bare led at 350mA, from straight above the led. Not as comprehensive as maukka's reports, but here are some screen pictures of the spectrometer:
So the rosiness that I observed is definitely there! And the CRI is there as well. Both a high R9 and R12. This is one nice led!
(and now this led in SST-40 package as well please)
Edit July 29th: some more CRI data of this led as build into a Convoy S9 can be found in post #15, also a pretty beamshot can be found there.
Edit August 6: some more CRI data of this led as built into a Jaxman E2L with Carclo triple TIR optic can be found in post #35.