Updated my UV-led test method (=final), tested a Luminus SST-10 365nm led (and some others)

With the highest respect intended, what a great lesson on UV light Professor djozz.
I’m a bit dumbstruck about the technicalities on measuring UV and the effort you have gone to. Thanks.
Discolouring paper as it leaves bits of light behind in it, amazing. I’m not sure if I should be scared when I come to visit now. :slight_smile:

Thanks Jensen, I’m glad you approve the method

LOL, professor djozz :slight_smile: , hardly so. If I try to read what the experts write down on light measurements, I ignore half of it pretending for myself that I would easily get it if I would dive a bit more into the subject :innocent:
But thanks! :slight_smile:

Thanks for the testing again!

If my current A/C leak detection torch ever dies (or more likely gets lost…), I’ll have to make another using that SST-10.

Looks good.

Thank you djozz for your excellent data. Do you think running the SST-10 at 1500mA or 2000mA will shorten the lifetime significantly? Any way to cram three of these in the Sofirn host that is now on sale for cheap?

LOL. You will need to apply sunscreen with a high protection factor before using it in a triple :sunglasses:

Agree, that will be one bright and throwy UV-light, it should work but since there is no affordable UV-pass filter in that size you will have to live with the little visible stray light.

About the lifetime question: I obviously have no longterm data on the SST-10 at 2A, but in general 365nm leds seem sensitive to overdriving them for a prolonged period, at least the Nichia 276A is reported to dim or fail over time.

I’ll let you know how it turns out…

You won’t get 2 Amperes through the SST on a single cell.

You are correct of course, and at the 1A per led that you will be able to run the triple direct drive on a single cell, the lifetime expectancy should be good.
The output should still be impressive though, at more than 3W radiation OTF.

Whoa professor Djozz. That’s a great DIY way to measure the UV. Salute! I thank you for doing this. I can imagine the joy you had doing it.
As for the 233B. Yes that’s just samples I got for PCB footprint testing. Please ignore the output.

- Clemence

Correct :party: , designing test methods is way more fun than continuing doing tests on new leds once the method is settled, but I will try to measure a new UV led every now and then.

But is there a triple optic that will work with UV?

I got information Simon is using a LG UV LED in next Convoy UV batches, as the SST-10 UV 365nm are more expensive at same performance
it is listed with 1360mW@0.7A

and drive current on the G1performance group is 700mA und the H1 1500mA max. he got the one that’s only 0.7A, but I think it will run fine at 1.5A

https://www.lasercomponents.com/fileadmin/user_upload/home/Datasheets/lg/lg_uv_led_overview.pdf

^ Cool! I have been trying to find that led for sale for 2 years now, but I can’t find it in small quantities with normal shipping costs. I even emailed lasercomponents.com because they are distributor of LG UV leds, but had no luck getting samples from them.

ask Simon from Convoy for a test sample

Good idea!

No need, he already lists the led for sale. But his picture is an older generation of LG UV-leds than I thought it would be. Still cool to test but not the latest and greatest.

At least he has 2. best flux bin and 3. lowest voltage bin
960-1060mW @500mA is impressive

Djozz, this is a great thread! I applaud your efforts to find a repeatable measurement method. :+1: