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Okay... Just curious here:
I've built a couple of 395-400nm UV lights using the eBay 3535 emitters and get good results for around-the-house fluorescence. What's the advantage of the more expensive 365nm emitters, which would you prefer in a light, and why?
I use mainly 365nm for curing Norland 61. 
Yeah, trits can be a nasty habit. 
Ironic you asked this poll, I've been wanting to get a uv flashlight.
Know anywhere to get a cheap 365nm flashlight?
Tempted to buy one of the 5w 18650 ones of eBay that doesn't list the nm.
(sorry for typos and formatting, this forum doesn't work well with phone typing.)
I choose 365nm because if i use a light at this wavelength i want to see the fluorescence reaction of the materials i aim this UV light at. The less visible light from the LED, the better i can see the reaction.
Anyone ever tested to see if it was really a 3W, or counted the emitters chips? (Supposedly 1W is 1-chip, 3W is 2-chip, and 5W is 4-chip.)
Most of the cheap 365nm ones I keep finding are Single chip 1W.
And does anyone have any pictures to compare between wavelengths?
(I'd like to see a 375nm compared to a 365nm. I'm thinking about getting a 375nm 3W)
A true 365 for $15? Seems really cheap from what I had seen when searching previously. Given the frequent overestimates of lumens, I’m be a little skeptical of the wavelength accuracy here.
Yep! made me look twice, has someone reviewed that light?
Got one ordered, M4D M4X has a code for 15% off on his deals PAGE I will give a quick review whenever I get it (used the discount to get better/faster shipping…) I am interested to see if Scorpions do fluoresce down here where I live (and how many I may have missed…)
I’ve been told that Whitetail Deer (and possibly other ruminants) see particularly well in the ~400nm range, meaning if you use “Whiteners” in your laundry you will stand out in the woods like Bozo the Clown.
A 400nm LED flashlight, shined on your hunting clothes, will show you where you stand out. If it glows, it goes!!
Use laundry detergent labelled for dark colors. Those lack the whitening agents.
So I got the Convoy S2 365nm in a couple of days ago. It has five modes…. Grrr… Not a fan of blinkys… Other than that, it is a nice light, my first Convoy. I have no idea how to tell if it is actually 365nm. The bit of visible light is more white than purple, but faintly purple none the less. White paper glows a blue, a piece of amber I have glows a milky blue. It does work.
The scary thing is to shine it at a piece of paper and put your glasses in between the lens and the paper, two pairs of “UV” protected glasses I had did NOT change the paper color back to white, thus they let this UV through…. All the others I had, the paper showed the glasses blocked the UV.
No scorpions yet, so a bit let down, but still looking.
The three levels are good, prior to the strobe/sos crud levels. The low works up close on documents or bills, med is good in a dark room and high is my outdoor setting with ~20 foot range on a quarter sized fluorescent item easily spotted.