Here is a list of a few things you can do with a UV light…
the tiny UV lights, are too dim to do anything in anything but total darkness
and even so they don;t really show much beyond 4-6 feet
depending on pattern and power
You can show your gf/wife urine stains on the bathroom walls walls after your gf/wife finish cleaning.
i can tell you are not happily married 
1, Everything white in your home “glows” when you shine a UV light on them. Lots of fun.
2, Check if your laptop / mouse / keyboard / screen…needs a good disinfectant wipe. You’ll be surprised how nasty they actually are (if you don’t wipe them every other day w/ alcohol wipes).
3, Install stuff, like tritium tubes, with UV glue.
UV light causes scorpions to glow nicely.
your teeth will glow blue/white
any implant or filling, or crown - will not
the white part of your eyes i think does
wle
i doubt any light powered by a tiny battery, has enough uv energy to cause problems
i mean the sun;s UV is about 100000000 times stronger
you can also ‘quick charge’ any glow in the dark item
wle
The sun also emits visible light so your pupils in your eyes contract to reduce the light getting in. Pure UV doesn’t have same effect so your pupils pen up to let more light in…ooops.
tiny batteries help with that
i stand by what i said
The real question is: Convoy S2 or S2+? Or Convoy S2 plus plus filter? 
And has lousy aim.
You can see the dried champagne splatters on your dinning room ceiling and walls
We use our UV S2+ with a ZWB2 lens to find puppy urine in carpeting. My youngest son (19) is into rocks these days and has take over the flashlight to illuminate a variety of them.
Always add the ZWB2 filter if you’re serious about this… 
This thread is useless without pictures.
@tactical_grizzly:
If my family ever lives somewhere where we can grow tomatoes again, we'll be using a UV light to find tomato worms.
Sweet!