395 or 365mm or ?
365 nm 
Get some good safety glasses that block UV-A if you're going to operate a 365nm source.
slmjim
both, and add 405nm too, cuz different things react to different wavelengths
Even my 450nm Royal Blue XP-E2’s will make some things react.
I was walking around outside with my D18 365. Is that eye safe? Like do I just need glasses for indoor use?
Even my (around 505nm) Cyan light will excite a few things.
I thought that 365 was safe for occasional indoor use as long as it’s not shined into your eyes. Like making plastic things glow
Yeah, i agree.
You feel it in your eyes though when it reflects into your eyes.
That doesn’t feel ‘good’ but i wonder if it’s all that dangerous.
But i guess UV blocking glasses would be a good idea anyway.
It obviously also depends on the output of the UV light you use.
A conservatively driven single Nichia shouldn’t cause any problems i.m.o.
Most things that fluoresce at all will do so at both 365nm and 395nm. Other than the red band in US100s, I can’t think of many things that fluoresce okay at 365nm but not at 395nm.
That’s why I’m typically not that picky, as long as the beastie has a ZWB2 filter on it.
Part of the issue is usually we use these UV lights in the dark, so your pupils are dilated, which lets more UV in.
Clear plastic safety glasses usually block UV; you can test them by shining the UV light through the glasses at a driving licence/banknotes/white paper etc. If they block the UV, the thing you’re shining the light at won’t fluoresce.
clear polycarbonate blocks anything below 400nm, so any safety glasses with PC lenses will do, no need for special glasses. just shine your uv light thru glasses to see if things that lit up before still do, just find something that wont glow at 400nm, or you'll have false results
That should be fine. It's mostly I door reflections I avoid. I treat UVA / UVB sotra like ionizing radiation; a little does a little damage, a little more does a little more damage. It's just my thing.
slmjim
TKS for all the info; got a “budget” no name 195 for $7, no filter, TKS LB, put a lumintop 165 with filter on my Amazon wish list. 
the main thing is to have no visible light, which may mean a z-block[?] glass
wle
Yes, a ZWB2 filter for 365nm LEDs is a must.