While they aren’t dangerous and work okay, the QC could be better. Received 100pcs 18650 with spot welded button tops barely welded on causing very poor performance. Then a batch of rusty 14500’s I had to bin. Reported to Sofirn who never bothered to respond or offer compensation…I bought 200 of them
I’m a dealer for Sofirn, but refuse to bundle their batteries. I rate all flashlights in my store with my own tested lumens, and I like to bundle a battery that achieves my lumen result. I find it a bit deceiving advertising a model at 3000 lumens and then bundling a battery that can only output 2000. This is the case with Sofirn’s batteries
The re-wrapped PLB 26650 Sofirn now sell is very decent though. I had been using this model way before Sofirn got their hands on them
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).
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.
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?
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.