I built a nice true 365nm light today and decided i would compare it to the Solarforce p60 UV.
365nm
Solarforce 410nm? UV
365nm
Solarforce 410nm? UV
Here's the Solarforce P60 UV drop in:
So after trying out the Two the 365nm emitter seems to be the better choice on certain items where as the solarforce drop in just spills blue light everywhere. Things seem to be a little more fluorescent (Brighter to the eye) with the solarforce UV over the 365nm wavelength.
It's strange how the 365nm has that white/clear hotspot but when it hits white paper it is blue, when it hits skin or other things like hair it shows the NORMAL color of the item it sits on.
Both have there pros and cons. So It would be great to find the same Solarforce emitter on a 16mm star so I can install it in a smaller host.
Any one here know where i can get something lower in the wavelength on a 16mm starsay...265nm?
lol 265nm is in germicidal range, something you do not want to look at or even be exposed to. it is uvc, it may give you cancer quite fast, and leave you blind.
not to mention they are pretty expensive, some run up to $6000 for 1 pc.
Nichia has 365nm LEDs that don’t emit any white light but they are expensive.
Most paper glows blue because they add a fluorescent dye to make it look brighter white. A similar dye is found in most laundry detergents, labelled as a “whitening agent”. That’s why there are laundry detergents “for dark colors”, they just lack any fluorescent dyes. wikipedia.org/wiki/Optical_brightener
Looks like a nice 18650 stainless steel tube-style light. Two emitters in a split reflector. Therefore probably neither give such a great beam profile, but useable and useful if it works.
Cannot tell which emitter is which from the description, but it looks like one is XM-L2 (silver surround and dot in corner) - likely the normal white emitter. Whilst the other would be the UV/Purple emitter.
Does anyone have any other information about this light, particularly the UV emitter and whether it might actually function as expected for a UV light?
Nice beamshots! Anyway, there are UV emitters that emit within the UV spectrum (plus a fair bit of blue/violet spectrum visible light. Then, there are also wavelength specific UV emitters that have a peak emission at a particular wavelength. As far as the latter category is concerned, Nichia UV emitters are amongst the best. Most of these emit minimal visible light, as has been mentioned.
Here are a couple of Nichia UV emitters that have been used in flashlights. Not cheap nor easy to source. You will need to reflow.
NCSU033B 365nm
NVSU233A 365nm
Why the big deal with these emitters?
Found this video on YouTube by hugo2x reviewing a nailbender P60 drop-in using the NCSU033B…
:exmark: Please use eye protection at all times when using UV emitters!!!
Well, 365nm is about the lowest you can go with the NVSU233A - other flavors include 385, 395 & 405nm.
And, if you’re going to get someone to reflow for you, why not just buy one of mash.m’s P60?
He’s sold a small number of P60s using the NVSU233A previously.
Living dangerously? To me, that would be the NVSU333A (3.6+W) 365nm. Definitely a skin cancer hazard. And if that doesn’t get you, the heart attack from the price tag probably will. These are after all designed to be run in water-cooled arrays.
To be fair, the Nichia UV emitters were designed primarily for industrial purposes ,e.g lithography, ink and resin setting, etc. Don’t think their engineers envisioned flashaholics cramming these into flashlights. Which is why they cost so much and why they are so difficult to procure.
Yup, 365nm + 385nm + 405nm NVSU233A sounds like a nice combination for a triple.
Though, offhand, few issues I can imagine :-
The price of the 3 emitters alone would be ridiculous
Sourcing the emitters - 365nm is available from a tiny number of vendors, but the other wavelengths are not that easy for the end-user to get hold of
The emitters have different Vf about 0.3V typical between the two extremes.
The release of magic smoke from said emitters is detrimental - see points 1) and 2)
i reflowed 3x3535 365nm on noctigon triple, i paid $20 for 4.
i installed them into this light, originaly it was rguv tripple, but after green started flickering, i repleaced g,r,uv tripple with all 3 uv triple. 700ma each.
but you can not use plycabonate tir sich as carclo, you need only pmma tripple from ledil, and window must be pmma too, polycabonate does not let uv below 400nm thru.
i bought 5 of these, they are ok, they make white paper, price stickers glow. as for lifetime, i did not run any of uv light i build for even 1\10 of that, can not confirm or deny it.
EDIT:
Also I have noticed that LCK LED and LEDDNA both have the name Law in their PayPal name and both are from Hong Kong. I wonder if Law is a common name in Hong Kong.
It is interesting that it has a footprint that fits one of the Sinkpads, and I'm curious if the output peaks higher and at a higher current like that. Looking forward to your build with it !
It is not the latest generation though, the NVSU333A U365 (mentioned above as well) has the same footprint but has an output that is more than 6 times higher (3640mW at 3.5A). I would like to see that happen on a Sinkpad as well :-) I think I do not want to know the retail price :-(
Which is why they cost so much and why they are so difficult to procure.
