^
What the man said!
I didn't have any contact to Mark for weeks. It seems he didn't get my messages. :-(
also interested. it is 35.99$ on amazon us currently, delivery estimate is may 10. so in about a month.
What’s the benefits of 365nm over the 395nm?
Some dyes (eg, the red strips on US hunnerts) barely glow under 395nm, but glow a bit more brightly under 365nm.
The red strip was always hard to get to fluoresce, and filtered 365nm is the only way to see it more easily.
I try to answer your question from a layman's point of view, so please excuse if I cannot give you a profound, scientifically proven comparison between 365nm and 395nm. ;-)
While 395nm (a.k.a. "black light") has a significant higher proportion of visible violet (stray) light, 365nm has (in theory) the higher proportion of non-visible UV light. However, there's still some visible stray light even with 365nm LEDs which can only be filtered by a ZWB2 filter. With a ZWB2 filter in place, there's much more high-energy UV light passing through the filter and lens when using 365nm LEDs. I do not know what exact LED Sofirn/Wurkkos has used for revision 2.0 of the WK30 but I suggested them to use LG's LEUVA33W70RL00 because it is quite robust at the interesting currents and rather cheap to source compared to Nichia's UV LED.
If you intend to use UV light for glueing, a flashlight with 365nm UV will let the glue dry quicker than one with 395nm. Geocaching/UV paint will probably light up more effectively under 365nm light. I'm sure there are more scenarios where 365nm is more interesting/useful - maybe someone else here can chime in and tell about it. :-)
365 nm has stronger fluorescence abilities according to what I have read.
I ordered a newer WK30 with 365nm UV (and are waiting for it to be delivered) as I am curious if I will be able to visually see a difference compared to my older WK30 with 395nm UV.
A picture comparing the two UV wavelengths from this link:
Kind of confusing. Ordered one from Amazon/US assuming it to be 365 nm.
After ordering, I checked to see if that was indeed the case. Read that the WK30 is
Listed as 395 nm.
Have they not updated their info. Or am I SOOL?
I believe you will receive the 365 nm UV from Amazon. I ordered one but are still waiting for delivery so I cannot say for sure but read this post from the other WK30 thread.
Okay, thank you for the detailed explanation.
I received 10 of them 2 weeks ago straight from Sofirn, how can I tell if it’s 365nm? The manual hasn’t changed specs but that’s to be expected
This may help: https://www.youtube.com/watch?v=t10pXsKqyDg
The one I received today appears to be the real deal... very little visible purple light.
I am also wondering how I will be able to determine if the newer WK30 is actually 365 nm UV after I receive it as I do not have any equipment to measure UV wavelength so I am hoping I will be able to see an obvious difference between my older 395 nm UV WK30 and the newer (hopefully) 365 nm UV WK30.
My older 395 nm UV WK30 clearly shows the red line security stripe hidden in the US $100 bill, but that bill is a crisp new uncirculated $100 bill obtained from a bank and may have an improved and more obvious red stripe than the older $100 bills had.
I do not have any Canadian bills or currency from any other country to compare between the older and newer WK30. Too bad I threw away all my black light posters after the '60s decade.
Below is a link investigating which minerals could allow one to distinguish between different UV wavelengths based on their fluorescence from the UV:
WK30 update to 365nm already, in 365nm wave band you could see more clear Pet feces, anti-counterfeit identification, fingerprints… ect
Don’t need a poop light, can smell them a mile away- but, yes, thanks! 
If I ever need to move into an "old folks home" and I can only bring one light with me, the WK30 will be the one I take and I will need it there for sure.
The WK30 is one of my all time favorite lights and impresses everyone who sees it.
I have two of the 395 nm UV lights and if the new one I am waiting for is 365 nm UV (and I can tell the difference between the two) then I will buy a second one of those and give one of the older 395 nm UV lights away. I will keep one 395 UV light to show people the difference from the improved 365 nm UV light.
Thank you Wurkkos and to all those involved with the development and distribution of the WK30.
wow, thank you so much, so glad to hear that :heart_eyes: :heart_eyes:
Got the WK30 from Amazon(US).
As I understand it, Wurkkos WK30 (US stock) has been changed from the 395nm
To the 365nm. Wow. I like that!
Upon looking at the user manual, it however states “Leuva 395nm”.
Bummer.
Hoping the manual is one that needs to be updated.
In the meantime, how does one determine which emitter it is? Confounding.
Wurkkos?
See above, I asked the same question
From Post #13 in another thread:
https://budgetlightforum.com/t/-/62306/13
From my Post #280 in another thread:
https://budgetlightforum.com/t/-/57734/280
The 395 nm UV LED in my older WK30 and the newer (and maybe) 365 nm UV LED in my new WK30 visually appear (to me) to be exactly the same physically when inspected under magnification.
So I am also interested in opinions others may have, especially if they have the ability to compare an older WK30 (with 395 nm UV LED) and / or a new WK30 (maybe with 365 nm UV LED) to other UV lights at 395 nm or 365 nm UV.
The Wurkkos WK30 is a unique and special light with either 395 nm or 365 nm UV and I enjoy it very much.