Intl-outdoor's 3535-size 365nm UV-led on 16mm Noctigon (Royalighting RY-3535P)

I went ahead and opened up the Kaidomain P-60 drop-in. They had an R150 current sense resistor on the buck driver, so I stacked an R056 on it. Put it back together with 22ga leads (it had like 28 ga)

Where it was pulling 300mA at the tail, it’s now pulling 470mA. And is considerably brighter! :slight_smile:

Thank you very much for the testing and writeup.

You write in such great detail and clarity about the considerations you make underway during your testing that it is always i pleasure for me to read these tests.



Thanks to you all for the nice comments again.

I have way more time to think of what I am going to do for the hobby and how and why, than I have actual hands-on time for testing and modding, I think that you can find that back in the write-up as lots of thoughts and considerations about what I did.

Without people like you and many others here none of us would have a grasp of this hobby.

so which centered gasket fit this led?
xpg or xml?
want to make a 16340 UVight :slight_smile:

The xp centering disc will work. It didn’t look right in a p60 so I didn’t use one. I just set the reflector over the led.

Just ordered a pair of these. Also ordered 2 of the same looking ones from an ebay seller to see if they’re the same.

Thanks for the testing and putting this all together.

CK, which ebay led? Can you give a link?

These have been popping up ebay for around $5 shipped - says 365nm as well. Anyone has tried these?

That looks like one mangled xb-d… like they pulled the dome off and scraped the phosphor ir…

I almost got those to but decided against them.

I got ebay item number 321464744098

So is it really 365 wave length as it said?

I would love to see how the KD P60 drop-in (with two cells) compares against the two emitters in the OP. The KD drop-in (two emitters under one dome) already works significantly better than anything else I’ve tried, and if the two in the OP work even better still, that’s pretty exciting.

Those UF-602C hosts are great for small mods and I’d love to use one for UV instead of the relatively huge SF-L2m I’m using now.

Excellent. Thanks Djozz.

FT has dual XP-E stars

Would this type of emitter be able to sanitize the air (kill microbes and whatnot)?

UV-leds have neither the power nor the wavelength to be the least effective in killing germs. UV-cfl tubes and other UV-sources have way more power and go much deeper into the UV-spectrum. Leds become only interesting if a directed beam is needed, cfl tubes can not do that.

Picked one of these up. You think ~1350mv is good

My in-law was saying that it shouldn’t shift with higher power

No, the Ledengin shows a shift of a whopping 0.3 nm when going from 400mA to 1000mA, I'm not sure if anyone is concerned by that ;-) .actually, temperature has a considerable larger effect: 3nm going from 20 to 85degC.

This chinese led surely will have other characteristics, but I would be surprised if the current->wavelength shift will be disastrous.

But apart from this, why run it at 1350mA ? Stick to 1 amp and you are almost at maximum power, you just make heat with the last 350mA (and stress the led unneccessarily).

I’m like dbc… I’ll try it at a amp then thanks djozz

If you refer to the KD drop-in that DCBstm posted here above somewhere, with the two die's side-by-side, this led will perform better already if only because it is a single die that will have a better beam, even in a small reflector. But I would think that the output is also better because it is a more modern led: the datasheet is from 2012, the two-die led from KD has been around for much longer.

The 16340 host is not the UF-602C host, but it is noticably smaller, and of better quality. It is this flaslight, unfortunately sold out at Fasttech. The 2x7135 NANJG driver came with the stock light :-)

Kaidomain P-60 drop-in

LED ENGIN LZ-1

Images taken with Canon 20D, in RAW, Manual mode, on a tripod, 1 second f/4.5 at ISO100. 10’ from bookshelf to camera sensor. No sharpening or any other adjustments applied, RAW converted to JPEG for sharing.

Base image with Auto settings and shot in JPEG

The Kaidomain drop-in is less bright with mutliple cells, the driver cuts the amperage the higher the voltage is to maintain a constant output current. I’ve tried it with as many as 6 cells (hope I’m remembering that right, I used 18500’s with multiple extension tubes on an L2P) directly comparing output from 1-6, 1 being the brightest in overall output.