I have been meaning to look into a filter.
I ordered the WK30 yesterday and they shipped it today so i should get it in 1-2 months. Is it a good UV emitter?
I don’t know what filter to look for or where to buy it (being in Canada).
No, I compared WK30 with S2+ w/o ZWB2 filter and found huge difference
Doubt you’d be able to find a filter for the WK30 with how it’s designed without blocking out the other two emitters.
I used to use the same LED in the S2+ which was fine, but every LED looks kind of useless without the filter installed.
The WK30 used to use a 395nm version, can you confirm whether it was the new 365nm?
Initially I have the same intention like you - ordered wk30 as my only uv light as I thought I won’t use it often. After playing around for a few days I felt unsatisfied and then ordered S2. I think it is still a good uv light, but saw huge difference after testing both in bathroom. After that I ordered ZWB filter for S2 (you cannot add zwb filter for wk30). The wk30 I received obviously has a different emitter than pictures posted on wk30 review threads here but I later found it is the exact same one used in sofirn sp31uv (no surprise) so believe it is still a 365nm emitter. The S2+ Nichia 365 I bought is the upgraded version with 7135x3 and Zeroair has a test review on it. To be frankly, I think you will eventually buy a S2+ if you are interested in a uv light. I actually like wk30 - it is a good light, 351 emitter has very neutral white light w/o any noticeable green tint. It is also very floody and red light is a big plus.
Yes I believe it is a 365nm emitter, 395nm emitter has lots more visible light and all 2021 wk30s should be 365nm (mine was manufactured in early 2021 according to serial no ). The one I received has the same emitter in sp31uv tested by davestechreviews, but it is different from wk30 review thread posted on BLF.
Yeah these DLG 18650 batteries are dirty cheap so I guess it is the reason why sofirn re-wrapped them. I do see a few has high internal resistance on my vapcell s4+ so obviously QC could be an issue. Other Chinese branded cells like LISHEN have the similar issue. I remember seeing a report saying that the QC failure rate of these Chinese cells is much higher comparing with major brands.
Resistance is never accurate on a charger though, you’d need something like this
I found the Sofirn 21700 5000mAh (Lishen LR2170SD) to be excellent, I reviewed it here I ended up purchasing 100pcs of these from 18650batterystore.
Can’t really expect China cells to match the same QC when they’re priced so much cheaper. They’re decent for what they are, I just wish Sofirn gave the option to bundle Samsung, Panasonic etc.
The older 395nm LED did have visible light “leakage”, but it was bluish/purplish, not too obtrusive.
The newer 365nm LED, which I don’t have in the WK30, but presumably in the SP31UV, which I do have, has an eerie greenish tint to its visible leakage.
The ’31 is a nice UV thrower if you want to spot scorpions, etc., before they’re actually crawling all over you, but it’s in desperate need of a ZWB2 filter. My old/original WK30 is perfectly usable without any filter.
That said, the UV S2+ with ZWB2 filter is the sangraal of UV lights.
Bah, nobody would tell me this before i bought the wrong light…
Ummm, did you ask? 
You’ll be happy with the ’30.
Yes, it was highly recommended
There’s a couple posts on the first page recommending the Convoy S2 UV with the ZWB2 filter
Indeed, i didn’t know until this thread that it was a better UV chip, just that it was another option.
Can that filter be bought as a large piece i can put over the light for the WK30?
While the Nichia LED is better than the LG, the massive difference is the filter
Convoy sell the C8+ with a large filter so perhaps you can ask Simon if you can purchase separately
Better in what way?
Also what does the filter do, i have not actually done any research on it yet, i figured i would play with the light then research filters.
Yep.
The reason you want an uv light is that you want to see things you cannot see. For this purpose S2+ with ZWB2 filter will be the solution. If you search uv 365nm on BLF you will easily find it is the one to get. Don’t take me wrong - wk30 is an excellent flooder with 90 CRI and you also get a decent red light and a regulated driver. What I was trying to say is that wk30’s uv is not comparable to S2+, not close.
I have four types of UV lights (Wurkkos "WK30", Sofirn "SP31UV", Lumintop "IYP UV", and Lumintop "Tool AA 2.0 UV").
All of these lights have 365nm UV LEDs, but only the "Tool AA 2.0 UV" (which supports 14500 Li-ion, Alkaline AA, and NiMH AA batteries) has a factory-included black ZWB2 UV filter lens which greatly reduces the visible light to provide the best UV experience and the difference is easily noticed (especially at night where white painted sheetrock walls appear dark and black when viewed with the "Tool AA 2.0 UV" with the ZWB2 filter compared to the other lights with clear lenses).
AmazonUS lists the Lumintop "Tool AA 2.0 UV" (with ZWB2 filter and 14500 Li-ion battery) for $25.99 and is currently offering an 8% discount coupon for a final price (before tax) of $23.87 but www.myvipon.com occasionally offers AmazonUS discounts on the "Tool AA 2.0 UV" for a final price of ~$16.50 (before tax).
I have multiple Wurkkos "WK30" lights and they are one of my favorite lights, but for UV-only use, the Lumintop "Tool AA 2.0 UV" with the ZWB2 filter is my current favorite. When the "Tool AA 2.0 UV" is "ON" (it has two brightness levels with memory) or when it is "OFF", the lens is always dark and black so it would be difficult to tell when it is "ON" during daylight, except it also has a special O-ring around the dark black lens which glows when it is "ON".
I have had and used the SC31 Pro and the light and the battery are both top quality.
I am a long life, duration kind of guy; you can get great runtimes on that light with the supplied Sofirn wrapped battery.
The same goes for the Sofirn IF25a light and battery combo. Again great runtime and battery performance.
You can trust them.