Cold, yes. Colder than I usually prefer. But at least if it’s like the SST-40 (as is expected), then it should be a pure white, not blue or purple. I put a few dedomed SST-40’s in Convoy L2’s and actually don’t mind the tint for a thrower.
I pulled the trigger on the Aliexpress listing last week. I can’t wait to see how they perform sliced / dedomed - should be good. Not that I really needed 10 of them :person_facepalming: but at less than $1 each, oh well
I’ll try a sliced one in my Amutorch JM70 (now a dedomed XP-L) when I get them. If it improves throw I might test it in my Olight M3XS…
Will definitely update here
I’m sorry but a SST-40 6500K is not pure white. With a reflector you can easily see plenty of blue and purple spill. No doubt it’s a great emitter but I think this ‘white’ tint assumption is way over hyped.
Cool, thank you for reminding me. I just purchased 5 sst20’s from kaidomain. Let’s see if it gets here before the 10 I ordered from aliexpress.
I’m new to this led game. But from the relatively small amount of knowledge I’ve learned all signs are pointing to a the next rockstar LED.
I will test and report back to this thread. Ill do fet with a brand new C8 sofirn and fet with ut02. I’ll start with old pani laptop batterys then work my way up to a Sony vtc4a.
I also have 10 coming from that AE listing. I had been waiting on a response from KD, then just grabbed the AE after not hearing anything for a week or so. Of course KD listed them like the day after I pulled the trigger :person_facepalming:
I will probably order a few. The low Vf and (probable) high luminance dedomed make it a winner. The sofirn C8F triple might be a good match for this LED.
I got my 10 SST-20’s LEDs from aliexpress yesterday, so today i rigged up a DC-DC buck driver powered by 2 sanyo GA,s. Measuring Volts with a cheapo MM. Measured amps with a Uni-t clamp meter. And lumens with a lumen tubes I copied off of VOB’s utube video(that has been surprisingly accurate).
The lead wires are very long, so I’m sure voltage sag is happening.
Here are my numbers. Take it with a grain if salt, or boulders of salt.
Thanks man. its no where near the level of accuracy you test at. Mcpcb is copper but not sure if its DTP. The mcpcb is what the leds came on from aliexrpress. maybe I should reflow them onto a Maxtoch and run numbers again.
I’ve seen your tests. You are great at testing LED’s. So I’m all ears. Any pointers would be greatly appreciated
For the re-test, this is what I’m thinking to change.
Reflow onto a known DTP mcpcb
Shorter LED wires.
? Put a reflecter on the LED ? Maybe a P60 SMO reflector.
Active Cooling.
I did the test fairly fast. As soon as I wrote down the results I raised the input,not allowing it to cool. should I wait and allow the LED to cool down.
I’m almost certain if I retest I’d get higher lumens, but higher lumens is not what I want, I want to be more accurate in this re-test. Either way, I’m fully open to recommendations.