Once you get your brandy new S2+ UV light there are several cautions to keep in mind. Like most curious minded BLFrs I waited until dark and went exploring. rugs interesting, WOW! my day glow shirts are spectacular. no bed bugs or scorpions so on to the downstairs bathroom, tile floor, wood paneling, white porcelin bowl which btw i take care to keep spotless! OMG, all over the bowl, the cover, the sides, the floor and walls. my next project is to attack said rest room with a variety of cleaners and methods to see what if any will clear this up. You might not want to show off your new light to your spouse by showing him/her the bath room!
thanks for sharing this. I wish I could just buy the perfect UV led. have so many lights already…
Go easy on your poor bowl…many cleaners have ’brightners’that glow under UV.
Indeed! I invited my kids to a house tour with the UV S2+ I lately received and they didn’t like the bathrooms at all …
Really when I checked my bathroom it was the darkest room of all.
I assumed that urin would not glow under 365nm UV.
Then you’ll certainly not want to bring it along when you stay in a hotel. It’s bad enough when it’s your stuff, but quite appalling when it’s someone else’s. I took my Convoy UV on my last trip and overall the places weren’t too bad. It was nice to be able to check the beds to make sure the sheets and pillows were clean.
We currently rely on it to find accidents from our dog that is still house training.
And just yesterday, I read an article about a person that sold their iPhone X for $860 and was paid with fake $20 bills stuffed in an envelope. If they had a UV flashlight, they could’ve checked the bills to make sure they were real.
Have you looked at trees? The barks can have some trippy color patterns under UV
I’m curious about the safey of using UV light. UV light is typically used as a sterilizer and products that uses UV light normally comes with health hazard warnings of looking at or coming into contact with UV light as it is carcinogenic.
I brought mine on vacation last year and was pleasantly surprised. We stayed in a well known LA hotel and all of the usual hot spots were barely even warm. I didn’t find any issues and I’ll gladly stay there again when I’m in town.
I am not an expert but I have done hte following calculations.
Exposure limits according to this document :
- 10000 J/ m^2 unweighted UV for the eyes per day
or - 30 J/m^2 weighted UV for the eyes per day
- 30 J/m^2 weighted UV for the skin per day
Assumptions:
- Apox. 1 W of UV flux @ exactly 365 nm
- Smallest spot possible apox. 3 cm^2 (Head of the light directly on the eye/skin)
Calculate power per m^2:
- (1000 cm^2) / (3 cm^2) * 1W = 333 W/m^2
Time to reach eye’s exposure limit:
Unweighted UV:
- (10000 J/m^2) / (330 W/m^2) = 30 s
Weighted UV:
- (30 J/m^2) / ((330 W/m^2) * 0.00011 = 826 s
Unweighted threshold is reached first after 30s
Time to reach skins’s exposure limit:
Weighted UV:
- (30 J/m^2) / ((330 W/m^2) * 0.00011 = 826 s
Threshold is reached after 826s
These calculations should represent the worst case scenario,
but I do not grantee that these calculations are correct. Use UV flashlights on your own risk!
Haven’t double checked your exact math but the concept is sound. Couple factors though. This would be in the UV-A spectrum. The light is visible (at least partly) so there is loss there. Did a quick NIOSH exposure search to see what the high UV limits are and not much luck.
If in doubt grab a pair of polycarb safety glasses and do a spot check shining through it on a fluorescing surface (No not into your eye!). That way you get the benefit of not having any of those “things” you find getting flung into your eye knowingly.