That’s no good.
Worst case for 365nm, just run it without glass, or mod a flip case. 100% transmittance when you use it.
This emitter linked below has been in my ebay Watch for quite a while. But $10 is quite pricey for something of unknown quality. Anybody had experience with one of these supposedly true 365nm?
The best results that I’ve had are from this drop in.
Since I’ve bought it I haven’t felt the need to look any further, I put an AR coated lens in front of it again from Kaidomain I’m using 6xCR123 3v cells at the moment but when they’re used up I’m going to put 4x18650’s in to power it.
It’s the best set up for me but that Tank007 TK-566 365nm 1W AA light in the OP looks hard to beat.
Same picture used on Aliexpress for a 3W 395-405nm. :~
I had a look around for some 365nm with datasheets.
LED Engin have a range of 365nm emitters, some multi-die too.
Damn. I had been avoiding any UV lights, because I couldn’t find the really good one in the OP. Now someone went and posted a link to it… so there’s a pretty good chance I’ll end up with one soon.
I am always looking for great UV lights, as I do forensic inspections, and most are crappy.
I did have a tank but they are not durable enough, and I end up having to bang it to make it go on, etc….but the beam itself was not that bad.
What I’m looking for is some way of projecting as strong a 365 nm range beam as I can, as far as I can, so I can sweep large areas at a time.
Unfortunately, I have no clue as to what the specs mean in real life, in that I find I know just enough to know I don’t know enough to be able to predict actual field performance.
IE: I try for one with higher uW/cm2 etc, but one is found to be measured at the LED, another at 6” and another at 15” and so forth.
So now I don’t even know what the top dog would output as a bench mark, etc.
Anyone have a handle on this?
Teej, I think purely from output point of view you’d be better off using a portable fluorescent UV source. The efficiency of LEDs at this wavelength really pales in comparison.
That’s true, and, I used to use them, but, I can’t carry them around and the other equipment at the same time, they’re too bulky and the tubes break too easily.
But the OUTPUT is like night and day, and if I could get even close to their output with an LED it would be a miracle - but, I just want to find the best bet for a 365 nm UV LED at this point.
Its slim pickins though.
TANK007 PT30 5W 365 nm might be what you’re seeking if $$$ is not an issue.
I’ve no idea what they’re like, as it’s outside my budget, yet may be within yours.
I believe they have a few higher priced UV torches around the same brightness.
I just received 5 bare 365nm 3w emitters from an Aliexpress vendor. I will hook one up and report back. Hopefully, tonight.
looking forward to your report Sir!
UV, its should be a glowing report.
I tried out one of these emitters that I paid $28.99USD shipped for 5 emitters. I can't tell if it's the real thing as I have no measuring equipment and have very little experience with UV lights. I drove the emitter DD with 3AAA's. Here is what I observed:
Edit: After using the emitter more now I'm thinking this may not be 365nm emitter. Almost everything seems to fluoresce better with my 12 emitter 395nm light. Also, the visible portion of the beam almost seems a neutral white. Kind of a creamy tan tint.
Where’s the Canadian money? We got new polymer bills too
Let me know which ones you want and I’ll get some over to ya!
-Jamie M.
Those bills are crazy Toysareforboys. I appreciate the offer, but I don't think these emitters are worth it. I'm going to complain to the vendor today.
How do GITD items compare with your 395nm?
Hi Helios-. The 395 fluoresces GITD stuff much more brilliantly. I'm thinking these emitters are actually higher frequency than the 395's.
That’s what it sound like.
When I looked at specs from the makers of higher power LEDs in that 365 nm range (The 365 is a LOT more expensive than the 395, esp as the watts go up, etc.)…
It seems to me that the situation is analogous to the tint situation for the Vis LED’s, in that the cooler tints are cheaper per lumen, and the longer wavelength UV are cheaper per watt per unit area emitted.
So a really strong 365 nm UV LED looks to cost closer to $150 for a real one…for just the LED, unless you are buying huge volumes, etc.
That means the ones for under $100 or the LED itself are probably either lower output and/or longer wavelength.
I had a Xenopus I got a few years ago that actually had great output, but, I use these things for work, and they get banged around a lot, and it needs to be replaced. I ordered another Xenopus UV to replace it, and I’ll let you know if it looks to be a good option in that 365 nm range.
I might be overpaying compared to a DIYS on this, but I don’t have the time to mess with it at the moment, and needs are current, etc.
If I was better versed in how to wire UV LEDs, etc, I might put in the research, but now, I can’t afford the time.
Yeah, I should have known better, but I was hopefull. I think you're right. If you want real 365nm, you have to pay the big dollars. Maybe, the vendor just made a mistake and send the wrong emitters. I have inquired, but have not received a reply yet.
Best of luck on your new acquisition Teej. Look forward to your report on it. Even if it isn't budget.
I use them for work, so, its budget, as in, my expense budget for forensic gear.
Actually since you said its visible output is white your led sounds like 365nm.
Do you see purple with your 395nm? How far each person can see into the edges of visible range can differ.
365nm leds are not as efficient as leds above 380nm. A 3W 365nm led puts out a lot less photons then a 3W higher wavelength UV LED. Compare LED Engin's High Power UV leds
700mA @ 3.9 V gives 550mW of 400nm light or 385nm.
700mA @ 3.9 V gives 200mW of 365nm light.
365nm is only 36% as efficient as 385nm here. This is for a quality name in high power UV leds, don't know how efficient chinese 365nm leds might be. Plus like with chinese lumens these may not even be "3W" to start with. Who knows what output to expect in the end.
Sort of need a known 365 and maybe 385 led to check how you see the visible output & compare to these chinese 3W leds.